The force responsible for the bouncing of the ball is the gravitational force.
According to Newton's law of universal gravitation, the gravitational force between any two bodies is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. Gravity is the force with which objects are attracted to the earth. Example - Leaves and fruit fall from a tree to the ground due to gravity. Gravitational energy is the energy stored in an object due to its height above the Earth (for example, when the object is far from the ground or near it). It is a form of potential energy. An object's height above the ground gives it its gravitational energy. This force is responsible for the bouncing of the ball when it hits the ground.
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What happens when a cold piece of metal is placed in hot water?
heat will flow from the water to the metal
heat will flow from the metal to the water
temperature will flow from the water to the metal
temperature will flow from the metal to the water
Heat will flow from hotter region to the colder region. When a cold piece of metal is placed in hot water heat will flow from water to the metal.
What is heat transfer ?Heat energy will transfer between regions over a temperature gradient. Heat flows from hotter regions to colder regions to balance the total heat energy.
In solids, heat transfer takes place by conduction mechanism where one hotter molecules transfers the energy to nearest molecules in the closely packed chain. In liquids and gases, heat transfers through convection.
When a cold piece of metal is paced in hot water, the heat energy from the water will flow to the colder metal. Hence, the temperature of water will reduce.
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determine the average force that the fist exerts on the head. ccording to a report on traumatic brain injury, the force that a professional boxer's fist exerts on his opponent's head is equivalent to being hit with a 5.9 kg bowling ball traveling at 8.9 m/s that stops in 0.018 s .
The average force applied to the skull by the fist is 5.9 kg x 498 m/s2, or 2,945 N.
What is force?Force is an action that can cause an object to change its motion and/or shape. It can be an external force, such as gravity, or an internal force, such as friction. Forces can be applied by a single object, such as pushing on a wall, or they can be the result of two objects interacting, such as when two objects collide. Newtons are used to measure force, which is a vector quantity both with magnitude and direction.
F = m x a
formula a = (Vf - Vi) / t
Therefore, the average force that the fist exerts on the head is 5.9 kg x 498 m/s2, which equals 2,945 N.
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Two horizontal forces, 225 and 165 N, are exerted on box. If these forces are applied on same direction, find the net horizontal force on the box.
When two forces are applied in the same direction, we can use the vector addition to find the net force. The net force is found by adding the magnitudes of both forces.
In this case, the two forces are 225 N and 165 N, and they are applied in the same direction.
Therefore, the net horizontal force on the box is:
Net force = force 1 + force 2 = 225 N + 165 N = 390 N
This means that the net force acting on the box is 390 N when two horizontal forces, 225 N and 165 N, are exerted on the box in the same direction.
a space stationis being builtin such a way that it can mimic earths gravity with centripetal acceleration, if the maximum tangetial velocity the ship can handle is 455 m/s. what should the radius of the ship be so the astronauts experience near earth gravity
One way to provide gravity in space is to spin a cylinder. The centripetal acceleration is provided by the normal force of the outside wall .
Why gravity is a force?However, in the broader sense, gravity is indeed a force because it describes the resulting interaction between two masses. Gravitational effects are fundamentally caused by the warping of spacetime and the motion of objects through the warped spacetime. However, the end result is as if a force was applied.
What unit is 9.8 gravity?The numerical value for the acceleration of gravity is most accurately known as 9.8 m/s/s. There are slight variations in this numerical value (to the second decimal place) that are dependent primarily upon on altitude.
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The spinning of a cylinder is one method of creating gravity in space. The outer wall's normal force produces the centripetal acceleration.
What makes gravity a force?But in a larger sense, gravity is a force because it represents the interaction that happens when two masses are in close proximity to one another. Fundamentally, the curvature of geometry and the passage of things through the stretched spacetime are what produce gravitational effects. However, the outcome appears to be the consequence of applying force.
What unit of gravity is 9.8?The most precise measurement of the gravitational acceleration is 9.8 m/s/s. This number has small fluctuations (to the first significant digit) that are mostly determined by altitude.
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FILL IN THE BLANK it is illegal to follow an emergency vehicle at a distance of_____or to stop within ______ of where an emergency vehicle is responding to an alarm.
It is illegal to follow an emergency vehicle at a distance of less than 500 feet or to stop within 300 feet of where an emergency vehicle is responding to an alarm.
How does maintaining a safe distance from an emergency vehicle enhance the safety of both the emergency vehicle's crew and other drivers on the road?Maintaining a safe distance from an emergency vehicle enhances the safety of both the emergency vehicle's crew and other drivers on the road by providing the emergency vehicle with the necessary space to maneuver and respond quickly to an alarm. When an emergency vehicle is responding to an alarm, it may need to make sudden stops, turns or change speed quickly, and if the vehicle behind is too close, it may not be able to react in time and cause an accident. By maintaining a safe distance, other drivers can react in a timely manner to the emergency vehicle's movements, reducing the risk of collisions and accidents. Additionally, maintaining a safe distance can also help to increase visibility for the emergency vehicle's crew, which can help them to navigate through traffic more safely and quickly. This ultimately contributes to the safety of all parties involved.
This statement is referring to laws and regulations regarding the distance that a driver must maintain from an emergency vehicle that is responding to an emergency call or alarm. Following an emergency vehicle too closely, or stopping too close to where an emergency vehicle is responding to an alarm, can impede the emergency vehicle's ability to respond quickly and safely.
It is illegal to follow an emergency vehicle at a distance of less than 500 feet because this distance is considered to be too close and can pose a safety hazard to the emergency vehicle and its crew. When an emergency vehicle is responding to an alarm, it may need to make sudden stops, turns or change speed quickly and if the vehicle behind is too close, it may not be able to react in time and cause an accident.
It is also illegal to stop within 300 feet of where an emergency vehicle is responding to an alarm. Stopping too close to the emergency vehicle can block the view of other drivers and make it difficult for the emergency vehicle to maneuver. Additionally, it can impede the flow of traffic and make it difficult for other vehicles to pass, which can cause a backup and delay the emergency vehicle's response time.
In summary, these regulations are put in place to ensure the safety of emergency vehicle's crews and other people on the road, and to make sure that emergency vehicles can respond to an alarm quickly and safely.
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failure of 'o-ring' seals led to the tragic explosion of the of the challenger space shuttlehallenger space shuttle
O-ring seal failure caused the fatal magnitude the of the An O-ring, a spherical gasket used to seal the right rocket booster, was found to be the primary culprit in the mishap.
What big was the Challenger's failed O-ring?On the Challenger, the O-ring had a circumference of 12 feet. As the igniters ignite the fuel upon launch, there seems to be high pressure on the inside of the solid rocket boosters. The parts holding the O-ring flexed slightly as a result of the pressure.
Who of the following is best recognized for expressing grave worries about the O-ring months just before launch of the space shuttle Challenger?He was required to appear before an executive panel, and when he did, he informed the commission's chairman, William Rogers, that Morton Thiokol had been so worried about the Aaaaa that they had advised NASA not to launch the spacecraft in conditions that were cooler than 53 degrees.
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1. Why is it necessary to do a vector resolution problem using the force of Static Friction, in order to theoretically determine the Angle of Repose?
2. What does a very low Angle of Repose tell you about the kind of surface at play?
3. What does it tell you about the Coefficient of Static Friction?
Answer:
A stone is thrown up wards with an initial velocity of 25 m/s at an angle of 30 to the ground.
A high fountain of water is located at the center of a circular pool as shown in the figure below. A student walks around the pool and measures its circumference to be 34.8 m. Next, the student stands at the edge of the pool and uses a protractor to gauge the angle of elevation of the top of the fountain to be = 60.0°. How high is the fountain?
m
The height of the fountain is 9.6 m.
What is the radius of the pool?
The radius of the pool is calculated by applying the formula for circumference of a circle.
P = 2πr
where;
r is the radiusr = ( P ) / ( 2π )
r = ( 34.8 ) / ( 2π )
r = 5.54 m
The height of the fountain is calculated as follows;
the angle of elevation, radius of the pool and the height of the fountain forms a right triangle.
let the height of the fountain = h
tan 60 = h / r
h = r x tan 60
h = ( 5.54 m ) x tan 60
h = 9.6 m
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As shown, a server at a restaurant is carrying a tray that has a glass of water resting on it. The glass and tray exert a force with magnitude F1 = 4.00 on the server's hand. If l1 = 1.45 ft, l2 = 1.15 ft, l3 = 0.500 ft, σ1 = 145o, and σ2 = 110o, what is the moment of force about the shoulder joint at point A? Assume that moments acting in the counterclockwise direction about point A are positive whereas moments acting in the clockwise direction are negative. ft
MA = ??? lbo ft
positive while seconds moving counterclockwise Direction are negative 1.18lb.ft
What is the most accurate way to define direction?Direction is characterized as the course that anything follows, the route that needs to be taken to go to a particular location, the direction where something is beginning to take shape, or the direction you are facing. When you turn right instead of left, that is an illustration of direction.
WHY IS DIRECTION ESSENTIAL?Directions explain how to perform an action or the proper sequence. You are provided instructions for a number of your activities and assessments. It's critical to comprehend the motivation behind the instructions. Before starting anything, it's also crucial to follow ALL of the instructions.
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The speed of light is ×2.998108/ms. How long does it take light to travel 90.cm?
Set the math up. But don't do any of it. Just leave your answer as a math expression.
Also, be sure your answer includes all the correct unit symbols.
Time=0.9/2.998*10^8 is the equation for how long it takes light to travel 90 cm.
What is speed?Velocity is the rate and direction of an object's movement, whereas speed is the time rate at which an object is moving along a path. In other words, velocity is a vector, whereas speed is a scalar value. the speed at which an object's position changes in any direction. The distance traveled in relation to the time it took to travel that distance is how speed is defined. The direction of a body or object's movement is defined by its velocity. In its basic form, speed is a scalar quantity. In essence, velocity is a vector quantity. It is the speed at which distance changes. It is the displacement change rate.
Here,
distance=90 cm=0.9 m
speed=2.998*10^8 m/s
thus time taken will be:
=distance/speed
time=0.9/2.998*10^8=0.10006 seconds
thus the expression is:
time=0.9/2.998*10^8
The expression for how long does it take light to travel 90 cm is time=0.9/2.998*10^8.
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Of the list of terms and phrases below, select the ones that describe either formation areas or atmospheric conditions ideal for supercell thunderstorm development.
Group of answer choices
the US Central Plains states in spring
the warm sector of a developing mid-latitude cyclone
strong upper-level convergence
strong surface convergence
strong updrafts
the US Pacific Northwest in summer
cool, dry air in the mid-levels above warm moist air near the surface
strong vertical wind shear
Your students should be informed that the warm sector of a mid-latitude cyclone is the region situated between the leading warm front and the trailing cold front. The space behind the cold front is known as the cold-sector.
In a mid-latitude cyclone, what is its warm sector?Your students should be informed that the warm sector of a mid-latitude cyclone is the region situated between the leading warm front and the trailing cold front. The space behind the cold front is known as the cold-sector.The US Central Plains states in the warm sector of a developing mid-latitude cyclone in the spring are the formation areas or atmospheric conditions optimal for supercell thunderstorm development.Your students should be informed that the warm sector of a mid-latitude cyclone is the region situated between the leading warm front and the trailing cold front.To learn more about atmospheric conditions refer to:
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which of the following patterns would you observe if you started at sea level and traveled upward through the earth's atmosphere to an elevation of 100 km?
The patterns would you observe if you started at sea level and traveled upward through the earth's atmosphere to an elevation of 100 km are-
decreasing pressure decreasing densityIn this case, Option B and F are correct.
The atmosphere is what?
The layer of gases that envelops the Earth and other planetary bodies is the atmosphere. It is made up of various gases, including nitrogen, oxygen, and others, as well as vaporized water, dust, and other materials. The atmosphere shields us from harmful solar radiation while also assisting in climate control on Earth. Life on Earth as we know it would not exist without it.You would notice a drop in temperature, an increase in air pressure, and a drop in the amount of oxygen available if you started your journey at sea level and rose through the Earth's atmosphere.As you ascended, you would also notice a reduction in the amount of dust, water vapor, and other atmospheric particulates.To know more about atmosphere click-
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Which of the following patterns would you observe if you started at sea level and traveled upward through the Earth's atmosphere to an elevation of 100 km? Choose one or more:
A. a progressive decrease in temperature
B. decreasing pressure
C. changes from warming trends to cooling trends at distinct boundaries D. increasing pressure
E. increasing density
F. decreasing density
Two objects are traveling around different circular orbits with constant speed. They both have the same acceleration but object A is traveling twice as fast as object B. The orbit radius for
object A is _____ the orbit radius for object B
A. one-fourth
B. one-half
C. the same as
D. twice
E. four time
The orbit radius for object A is B. one-half the orbit radius for object B
If the velocity only changes in direction (constant speed), then its acceleration has constant magnitude and is called centripetal.
Do elliptical orbits have constant velocities?An orbit that is perfectly balanced and has a constant speed is called a circular orbit. There are countless different elliptical orbits where velocity and speed are variable.
The velocity of an item rotating in a circle at a constant speed changes. This is thus because velocity depends on both speed and direction as a vector variable. Even if its speed is constant, the object in orbit is accelerating because its velocity is changing.
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difference between speed and velocity, and describe how speed and velocity impact your acceleration.
Speed is the rate at which an object moves, while velocity is the speed of an object in a given direction, and acceleration is affected by both speed and velocity, as an increase in either can cause an increase in acceleration.
How is speed and velocity measured? Speed is the rate at which an object is travelling at any given moment, usually measured in units such as miles per hour (mph) or kilometers per hour (kph). Velocity is the rate of change in the object’s position over a period of time, typically measured in units such as meters per second (m/s).Speed can be measured directly, using devices such as radar guns, and is also inferred from distance and time measurements. Distance can be measured using a variety of methods, such as a ruler, a GPS device, or a map. Time can be measured using a stopwatch, a clock, or by measuring the amount of time it takes an object to travel a certain distance.Velocity is calculated by dividing the distance an object has traveled by the amount of time it took to travel that distance. For example, if an object moves a distance of 5 meters in 2 seconds, its velocity is 2.5 m/s.Speed and velocity can also be measured indirectly, using a variety of instruments such as accelerometers, gyroscopes, and other motion sensors. These instruments measure the object’s acceleration, which is the rate of change of its velocity over time. By combining the measurements of acceleration, distance, and time, speed and velocity can be calculated.To learn more about speed and velocity refer to:
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until he was in his seventies, henri lamothe excited audiences by belly-flopping from a height of 9 m into 31 cm. of water. assuming that he stops just as he reaches the bottom of the water and estimating his mass to be 60 kg, find the magnitudes of the impulse on him from the water.
The magnitude οf the impulse is −1120 Ns.
How to calculate the magnitude of the impulse?In its simplest form, an impulse is a fοrce that has been gradually integrated. By dividing the force's magnitude by the length of time it is applied, we can calculate the impulse's size for a force with a constant magnitude.
From the infοrmation given, the fοllowing can be deduced:
Height = 10m
Mass = 64kg
The kinetic energy is calculated as 1/2mv² while pοtential energy is calculated as mgh. Frοm the law of conversation:
[tex]\mathrm{ \dfrac{1}{2} mv^2 = mgh}[/tex]
[tex]\mathrm{v = \sqrt{2gh} }[/tex]
[tex]= \sqrt{2} \times \sqrt{9.8 } \times\sqrt{9}[/tex]
= 13.28 m/s
The change in velocity will be;
= 80(0 - 14)
= 80 × (-14)
= −1120 Ns
In cοnclusion, the magnitude οf the impulse is −1120 Ns.
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according to erikson, preschoolers' exuberant play and bold efforts to master new tasks break down when they .
Erikson believed that the adverse effect of early childhood was an excessively rigid superego that led to children feeling excessive guilt as a result of adults' excessive threats, criticisms, and punishments.
What is rigid?A body that does not deform or change shape is idealized as a rigid body. Formally, it is described as a group of particles with the property that their distance from one another does not change as the body moves. A solid body that neglects deformation is referred to as a rigid body. In other words, regardless of the forces acting on a rigid body, the distance between any two points remains constant over time. A metal rod serves as an illustration of a rigid body.
Here,
Erikson thought that an excessively rigid superego, brought on by adults' excessive threats, criticisms, and punishments, was the negative effect of early childhood, which caused children to experience excessive guilt.
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thurat the boiling point, the density of the liquid is and that of the gas is . how many liters of liquid nitrogen are produced when of nitrogen gas is liquefied at ? round your answer to significant figures.
When the melting point, liquid density, and gas density are specified, 1.360 L of liquid nitrogen is created.
We presume that the specified volume of gas is fully liquefied because no other requirements are provided (no equilibrium gas phase).
Determine the mass of nitrogen as follows:
241.0L * 4.566 g/L = 1100.406g.
Determine the amount of liquid nitrogen based on the mass determined in step 2:
Volume = mass/liquid density = 1100.406g/L = 1.360 L.
A liquid's density is a measurement of how heavy it is for the amount measured. When two liquids of identical weight or volume are weighed, the heavier liquid is more dense. A liquid that is less dense than water will float on the surface of the water if it is gently added to the surface.
The correct question is:
At the boiling point, the density of liquid nitrogen is 809 g/L and that of the gas is 4.566 g/L. How many liters of liquid nitrogen are produced when 241.0 L of nitrogen gas is liquefied at 77.36 K?
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gantemede is jupiter's largest moon. determine the gravitational field strength on the surface of ganymede
The gravitational field strength on the surface of Ganymede is equal to 1.75 × 10^11 m/s^2. This is approximately 200 times the gravitational field strength of Earth.
What is gravitatonal field?Gravitational field is a region of space that is affected by the gravitational force of a massive object, such as a planet or star. It is the region in which any mass inside it experiences the force of gravity, and any mass outside of it does not. Gravitational fields can be measured in units called Newtons per kilogram (N/kg). The strength of the gravitational field is proportional to the mass of the object, with more massive objects creating stronger fields. In general, gravity is the weakest of the four fundamental forces, but it still has a profound effect on the behavior of matter and energy.
The gravitational field strength on the surface of Ganymede can be determined using Newton's law of gravity. According to this law, the force of gravity between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. Therefore, the gravitational field strength on the surface of Ganymede is equal to the gravitational force of Jupiter divided by the square of the distance between them.
The mass of Jupiter is 1.898 × 10^27 kg and the distance between Jupiter and Ganymede is 1.07 × 10^9 meters. Therefore, the gravitational field strength on the surface of Ganymede is equal to 1.75 × 10^11 m/s^2. This is approximately 200 times the gravitational field strength of Earth.
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A 60.-kilogram man is pushing a 30.-kilogram lawn mower. Compared to the magnitude of the force exerted on the lawn mower by the man, the magnitude of the force exerted on the man by the lawn mower is
answer choices
O one-quarter as great
O one-half as great
O the same
O twice as great
O the same
The magnitude of the force exerted on the man by the lawn mower is equal in magnitude to the force exerted by the man on the lawn mower, thus the answer is the third option i.e. the same.
Following are the three Newton's Law of Motion:
First Law - Newton’s first law of motion states that if a body or a object is at rest or moving at any constant speed in a straight line, it will remain at rest or keep moving in that straight line at that constant speed unless it is acted upon by a force. This law is known as Law of Inertia.
Second Law - Newton’s second law of motion is a quantitative description of the changes that any force can produce/insert on the motion of a body. It states that the timely rate of change of the linear momentum of a body is equal in both the magnitude and the direction to the force imposed on it.
Third Law - Newton’s third law of motion states that when two bodies interact, they both apply forces to one another that are equal in magnitude and opposite in direction. This third law of motion is also known as the law of action and reaction.
Using principles of third law of motion, we can make that the man pushing the lawn mower applies the same amount of force (in magnitude) as the lawn mower applies on him, thus the answer to the question is the third option i.e. the same.
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A mass is attached to the end of a spring and set into oscillation on a horizontal frictionless surface by releasing it from a stretched position. If the maximum speed of the object is 2.23 m/s, and the maximum acceleration is 5.77 m/s2, find how much time elapses between a moment of maximum speed and the next moment of maximum acceleration.
(Answer should be in seconds)
Hint: What fraction of a period is the time between the maximum speed and acceleration? How are the maximum speed and acceleration related to the period of oscillation?
The time that elapses between a moment of maximum speed and the next moment of maximum acceleration is 2.43 seconds.
What is the period between maximum speed and acceleration?The time that elapses between a moment of maximum speed and the next moment of maximum acceleration is calculated as follows;
V (max) = 2πfA ------ (1)
a (max) = ( 2πf )² A ------ (2)
where;
f is the frequency of the oscillationA is the amplitude of the oscillationSince both equations have amplitude, A, we will make A the subject of the formula.
A = (V.max) / ( 2πf)
A = (a.max) / ( 2πf)²
(V.max) / ( 2πf) = (a.max) / ( 2πf)²
V.max = (a.max) / ( 2πf)
f = (a.max) / ( 2π x V.max)
Period, T, = 1 / f
T = ( 2π x V.max) / a.max
The period of the oscillation is calculated as follows;
T = ( 2π x 2.23 ) / ( 5.77 )
T = 2.43 seconds
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Large diameter lines carrying low pressure fluids such as engine return oil and cooling air are typically joined by a rubber hose that is slipped over the tube ends and held in place with screw type hose clamps
The main justification is that pressure decreases with surface area. Rubber hoses are widely used to connect large diameter lines that carry low pressure fluids, like cooling air and engine return oil.
The total area of an object's three-dimensional exterior surfaces, or the sum of its faces, is known as surface area. The main justification is that pressure decreases with surface area. Rubber hoses are widely used to connect large diameter. Its measurement units are square. In other words, the sum of all the areas of all the shapes that cover a surface equals the surface area of the object. A circle's diameter is equal to twice its radius in length. Measuring the distance between the circle's centre and its end allows one to determine the radius.
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The complete questions is -
Large diameter lines carrying low pressure fluids such as engine return oil and cooling air are typically joined by a rubber hose that is slipped over the tube ends and held in place with screw type hose clamps, Why?
Find the average power Pavg created by the force F. Express your answer in terms of the given quantities and, if necessary, appropriate constants. You may or may not use all of the given quantities (F, m, μk, t, s).
Let us now consider some questions that include numeric data.
A sled is being pulled along a horizontal surface by a horizontal force F⃗ of magnitude 600 N. Starting from rest, the sled speeds up with acceleration 0.08 m/s2 for 1 minute.
Part F
Find the average power Pavg created by the force F⃗ .
Express your answer in watts to three significant figures.
Find the instantaneous power P created by the force F⃗ at t=10s.
Express your answer in watts to three significant figures.
Average power Pavg created by the force F is 48 watts, instantaneous power P at t = 10s is 480 watts.
To find the average power created by the force F, we can use the formula:
Pavg = (Work done by the force) / (time interval)
The work done by the force F can be found using the formula:
Work = force x distance
The distance is the displacement of the sled, which can be found using the formula:
distance = (initial velocity + final velocity) / 2 * time
The sled starts from rest, so its initial velocity is 0 m/s.
We know that the acceleration of the sled is 0.08 m/s^2 and the time is 1 minute, which is 60 seconds.
So the final velocity is:
final velocity = 0 + 0.08 m/s^2 x 60s = 4.8 m/s
We know that the force F is 600 N, so the work done by the force is:
Work = F x distance = 600 N x (4.8 m/s) = 2880 J
We know that the time interval is 1 minute, which is 60 seconds.
So the average power created by the force F is:
Pavg = Work / time interval = 2880 J / 60s = 48 watts (to 3 significant figures)
To find the instantaneous power P at t = 10s, we can use the formula:
P = F x v
where v is the velocity of the sled at time t.
We can find the velocity of the sled at time t using the formula:
v = v0 + a*t
where v0 is the initial velocity (0 m/s), a is the acceleration (0.08 m/s^2) and t is the time (10s)
so we can substitute v = v0 + a*t
v = 0 + 0.08 m/s^2 x 10s = 0.8 m/s
We know that the force F is 600 N, so the instantaneous power P created by the force F at t=10s is:
P = F x v = 600 N x 0.8 m/s = 480 watts (to 3 significant figures)
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polly ester and ray ahn are doing the elastic collision lab on a low-friction track. cart a has a mass of 0.75 kg and is moving rightward at 14.7 cm/s prior to the collision with cart b. cart b has a mass of 2.00 kg and is moving leftward with a speed of 64.2 cm/s.
The post-collision speed and direction of cart B in cm/s is 32.5 cm/s in the right
From the law of conservation of momentum, the sum of initial momentum equals the sum of final momentum
Momentum, p-mv where m is the mass and v is the velocity
m1v1 + m2v2 = (M1V2 + M3V₁)
Let right direction be positive while left negative hence
1 x 27.6 + (0.5*-42.9) = 1 x -10.1 + 0.5v
16.25 = 0.5v
v = 16.25/0.5 = 32.5 cm/s in the right
Hence, post-collision speed and direction of cart B in cm/s is 32.5 cm/s in the right
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IS there an afterlife
Answer: Depends
Explanation:
It completely depends on your religion and beliefs. This is not a question you can truly answer since it's opiniative.
A large adult is teaching a small child to ice skate. The adult has five times the mass of the child. They stand facing each other on the ice and push against each other to coast backwards. Which of the following best describes the force of the adult on the child, the force of the child on the adult, and their initial velocities?
A. The forces form an action-reaction pair, and the child velocity is five times the velocity of the adult and in the opposite direction.
B. The forces form an action-reaction pair, and the adult velocity is five times the velocity of the child and in the opposite direction.
C. The forces do not form an action-reaction pair, and the child velocity is five times the velocity of the adult and in the opposite direction.
D. The forces form an action-reaction pair, and the adult and child coast away at velocities that are equal in magnitude but opposite in direction.
The answer to the question is Option A i.e. the forces form an action-reaction pair, and the child velocity is five times the velocity of the adult and in the opposite direction.
According to Newton’s third law of motion (every force has an equal and opposite reaction force), when two bodies interact, both of them apply forces on one another that are equal in magnitude but opposite in direction. This third law of motion by Newton is also known as the law of action and reaction and the forces form a action-reaction force.
Thus, when the adult pushes the child with a force of any magnitude, the child pushes the adult with the same magnitude force but in opposite direction thus the forces are a form of action-reaction pair.
as, F = ma and the forces are equal in magnitude for both, the velocity of the adult and that of the child have an inverse relation as that of masses of both, thus the velocity of child is five times that of the adult.
Thus, the answer to the question is Option A.
ALSO, the conditions follow the law only because the man and the child are standing on a frictionless floor i.e. ice so there is no static friction in play holding the heavier mass back for force to be nullified.
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 A penny is dropped off of the top of the Statue of Liberty, which is 93 meters tall. How long will it take for the penny to hit the ground?
Answer:
About 4.4 seconds
Explanation:
[tex]h=1/2(gt^{2} )[/tex]
[tex]t^{2} =\frac{2h}{g}[/tex]
[tex]t=\sqrt{\frac{2h}{g} }[/tex]
[tex]t=\sqrt{\frac{2(93)}{9.8} } =\sqrt{18.98} =4.36[/tex]
Hope this helps
When you park on a hill, the direction your ____ are pointed determines which direction your car will roll if the brakes fai
When you park on a hill, the direction your front wheel are pointed determines which direction your car will roll if the brakes fail
Option D is correct.
Adjust your front tires so that, in the event of a brake failure, all front wheels are always pushed away from or lightly contact the curb if there is no curb.
When you park on a hill, which direction is influenced by where you look?When going uphill and coming close to a curb, turn the front tires against the curb. and make use of the curb as a barrier by letting your car slowly drift backward until the left rear wheel is resting there.
On a hill, how do you park gradually?Turn the wheels to the curb.
Turn your vehicle away from the curb when parking uphill. Turn them so that they are facing the curb if you are parking downhill. Step on the brake while the vehicle is in neutral, then fully rotate the steering wheel in the desired direction.
Question incomplete:
When you park on a hill, the direction your ____ are pointed determines which direction your car will roll if the brakes fail.
A. Side mirror
B. doors
C.rear wheels
D.front wheels
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which of the following best describes why we have seasons on earth? view available hint(s)for part a which of the following best describes why we have seasons on earth? the tilt of earth's axis causes the northern hemisphere to be closer to the sun than the southern hemisphere in summer, and vice versa in winter. the tilt of earth's axis causes different portions of the earth to receive more or less direct sunlight at different times of year. earth's elliptical orbit means we are closer to the sun and therefore receive more intense sunlight at some times of year than at others. the varying speed of earth in its orbit around the sun gives us summer when we are moving fastest and winter when we are moving slowest.
Thee tilt of earth's axis causes the northern hemisphere to be closer to the sun than the southern hemisphere in summer, and vice versa in winter.
In this case, option A is correct.
Describe the seasons: Each season is a distinct time of year that can be recognized by special climatic characteristics. Every year, the seasons of spring, summer, fall, and winter follow one another. Each experiences cyclical patterns of light, climate, and weather every year.
Why are the seasons so important?
Soil saturation, precipitation patterns, river flows, lake concentrations, and snow cover are all impacted by seasonal variations in temperature and precipitation. Plants deteriorate and leaves fall as the wet and cold seasons approach. These alterations in the flora have an impact on the type and availability of food for humans and other animals.
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A mass attached to a vertical spring causes the spring to stretch and the mass to move
downwards. What can you say about the spring’s potential energy (EPE) and the
gravitational potential energy (GPE) of the mass?
A) both EPE and GPE decrease
B) EPE increases and GPE decreases
C) both EPE and GPE increase
D) EPE decreases and GPE increases
The spring's elastic potential energy decreases and the gravitational potential energy increases.
What do you mean by potential energy?
Potential energy is the energy an object possesses because of its position or state. It is the energy an object has due to its height, position, or chemical composition. The unit of measurement for potential energy is usually Joules (J).
There are different types of potential energy, such as gravitational potential energy (GPE), elastic potential energy (EPE), and chemical potential energy.
When a mass is attached to a vertical spring, it causes the spring to stretch. As the spring stretches, it stores potential energy in the form of elastic potential energy (EPE). As the spring stretches, the potential energy stored in it increases.
At the same time, as the mass is attached to the spring and moves downward, it loses gravitational potential energy (GPE) due to the work done by gravity on the mass. Since the mass is moving downward, the gravitational force is acting in the opposite direction of the displacement, resulting in a decrease in GPE. Therefore, as the mass moves downward, the EPE of the spring increases and the GPE of the mass decreases.
Therefore, the spring's elastic potential energy decreases and the gravitational potential energy increases.
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A spacecraft travels along a straight line from Earth to the Moon. At what distance from Earth does the force of gravity exerted by Earth on the coasting spacecraft cancel the force of gravity exerted by the Moon on the spacecraft? Use the Moon's orbit semimajor axis as a distance between planets. Express your answer to two significant digits and include the appropriate units.
The gravitational force between any two bodies is inversely proportional to the square of the distance between them. The distance from Earth at which the force of gravity exerted by Earth on the spacecraft cancels the force exerted by the Moon on the spacecraft is 384,400 km.
What is a gravitational force?Gravitational force is a natural phenomenon by which all objects with mass attract each other. This force is one of the four fundamental forces of nature, and is the weakest of the four. It is the force that binds us to the Earth and keeps our feet firmly planted on the ground.
Part A: The gravitational force between any two bodies is inversely proportional to the square of the distance between them. Therefore, the force of gravity exerted by Earth on the spacecraft will be equal to the force of gravity exerted by the Moon on the spacecraft when the distance between them is equal to the Moon's orbit semimajor axis.
Part B: The Moon's orbit semimajor axis is 384,400 km. Therefore, the distance from Earth at which the force of gravity exerted by Earth on the spacecraft cancels the force of gravity exerted by the Moon on the spacecraft is 384,400 km.
To two significant digits, the answer is 384,400 km.
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