A is the correct answer. The arrow pointing up in A represents the force of gravity (mg).
What is force?Force is an external influence that can change the motion, direction, shape, and/or energy of a physical object. It can be a push, a pull, or a twist, and it can act on an object at a distance. Force is a vector quantity, meaning that it has both magnitude and direction.
The arrow pointing to the right represents the normal force (N), which is the force that the surface exerts on the block in order to keep it from sinking into the surface due to gravity. The arrow pointing down in A represents the frictional force (f), which is the force that the surface exerts on the block in order to prevent it from sliding along the surface.
1)
T > mg
The force due to tension acts upwards on the box and the force due to gravity acts downwards on the box. As the box is accelerated upwards then the T should be greater than the weight of the box.
ma = T - mg
mg = T- ma
Therefore, T> mg
2)
The option A, best describes the free body diagram.
3) In option A, the normal force is equal to the weight of the block which is kept at rest. N = mg
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Question is attached. Show Workings.
1) The force of the object is 2.25 * 10^-11 N
b) The force of the object is 5.63 * 10^-12 N
2) The mass of the object is 72 Kg
c) The acceleration due to gravity is 9.7 m/s^2
What is the gravitational force?We know that the gravitational force does speak of the force that is acting between two masses. It should be known that the gravitational force would depend both on the magnitude of the forces and on the distance apart.
Given that;
F = G m1m2/r^2
F = force on the objects
m1 and m2 = masses of the objects
G = Gravitational constant
r = distance of separation
1) F = 6.6 * 10^-11 * 35 * 35/60^2
F = 8.1 * 10^-8/3600
F = 2.25 * 10^-11 N
b) The force would then be; 1/4 * 2.25 * 10^-11 N =5.63 * 10^-12 N
2) 7 * 10^-9 = 6.6 * 10^-11 * m^2/7^2
m^2 = 49 * 7 * 10^-9 /6.6 * 10^-11
m =√49 * 7 * 10^-9 /6.6 * 10^-11
m = √3.43 * 10^-7/6.6 * 10^-11
m = 72 Kg
3) g = Gme/r^2
g = 6.6 * 10^-11 * 6.0 * 10^24/(6.38 * 10^6)^2
g = 39.6 * 10^ 13/4.1 * 10^13
g = 9.7 m/s^2
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a 15.0 cm object is 12.0 cm from a concave mirror that has a focal length of 4.8 cm. its image is 8.0 cm in front of the mirror. what is the approximate height of the image produced by the mirror?
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A concave mirror with a focal length of 4.8 cm is 12.0 cm away from an item that is 15.0 cm in size. Its reflection is 8.0 cm away from the mirror. The approximate height of the image produced by the mirror is 10 cm.
We are given that the object is 15.0 cm tall and 12.0 cm away from the mirror, which has a focal length of 4.8 cm. The image is 8.0 cm in front of the mirror. By substituting the given values into the mirror equation, we can solve for d_i: 1/4.8 = 1/12 + 1/d_i. d_i = 8cmNow we can use the magnification equation m = -d_i/d_o = -8/12 = -2/3. The negative sign indicates that the image is inverted. We can use the magnification equation to calculate the height of the image:
h_i = m * h_o = h_i = (-2/3) * 15.0= h_i ≈ -10 cm
So the approximate height of the image is -10 cm.A concave mirror has a reflective surface that is curved inward and away from the light source. Concave mirrors reflect light inward to one focal point. Unlike convex mirrors, the image formed by a concave mirror shows different image types depending on the distance between the object and the mirror.
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an unwary football player collides with a padded goalpost while running at a velocity of 8.70 m/s and comes to a full stop after compressing the padding and his body 0.360 m. (a) what is his deceleration in m/s2? (enter the magnitude.)
-25.83 m/s2. an unwary football player collides with a padded goalpost while running at a velocity of 8.70 m/s and comes to a full stop after compressing the padding and his body 0.360 m.
what is velocity ?
Velocity is also important in other branches of physics, such as fluid dynamics, where it is used to describe the speed and direction of a fluid flow. In astronomy, velocity is used to describe the speed and direction of stars and galaxies.
In physics, velocity is usually expressed in terms of meters per second (m/s). Other units, such as kilometers per hour (km/h) and miles per hour (mph) can also be used.
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The mass of Venus is 81.5% that of the earth, and its radius is 94.9% that of the earth.
(a) Compute the acceleration due to gravity on the surface of Venus from these data. (Express your answer in terms of the acceleration due to gravity on the Earth.)
__ gE
(b) If a rock weighs 29.4 N on earth, what would it weigh at the surface of Venus?
___ N
On Venus's surface, the acceleration brought on by gravity is 0.90495(gE). The acceleration brought on by a planet's gravity.
What makes gravity a force?However, gravity is a force in a more general sense since it symbolizes the interaction that takes place when two masses are close to one another. Gravitational effects are fundamentally caused by the stretching of spacetime and the motion of things through the stretched spacetime. The effect, nevertheless, seems to be the result of using force.
What three types of gravity are there?Gravity only comes in one variety. In nature, there is only one form of gravity. According to their masses and the separation between their centers, there is only one kind of gravitational force that draws the two bodies together. Gravity is the weakest force known to exist in nature and is a form of central force.
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a solid disk of mass m, radius r and rotational inertia i is free to rotate about a fixed frictionless axis that is perpendicular to the disk through its center, as shown above. a force of constant direction and constant magnitude f is exerted on the disk. question if the disk is moving clockwise with an angular speed of 5.0rads with angular acceleration of magnitude 1.3rads 2 . what is the angular speed of the disk three seconds later?
A force of constant direction and constant magnitude Fis exerted on the disk. A solid disk of mass M radius R and rotational inertia I is free to rotate.
What do you understand by direction?Direction is defined as the path that something takes, the path that must be taken to reach a specific place, the way in which something is starting to develop or the way you are facing. An example of direction is when you go right instead of left.
How do you write directions?Think about and visualise the route. Jot down short notes. Check over the route your mind again, to make sure your steps are logical and nothing is left out. Plan what direction, distance and landmark words to use.
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What is the force of gravity on a woman who weighs 926 N on the surface of the earth?
Explanation:
The force of gravity on a woman who weighs 926 N on the surface of the earth is 926 N. The weight of an object is a measure of the force exerted on the object due to gravity, and is equal to the mass of the object multiplied by the acceleration due to gravity. On the surface of the Earth, the acceleration due to gravity is approximately 9.8 m/s^2.
Answer:926N
Explanation:
Force=926N.
The units of force are in N (Newtons). The units of weight are in Kg (Kilograms)
Force = Mass * Acceleration
On the surface of the Earth, the acceleration would be gravity, 9.81m/s²
If calculating mass...
F=mg
926N=m(9.81m/s²)
m=94.393476kg
A car i moving on a traight road at 5m/. It i accelerated at 3ml. What will be it velocity after 4 econd?
The initial velocity of the car is 17 meters per second. It is accelerated at 3m/s^/2.
What is the best way to define acceleration?Acceleration is the rate of change in both speed and direction of velocity over time. When anything moves faster or slower in a straight line, it is said to have been accelerated. Because the direction is always shifting, motion on a circle accelerates even while the speed is constant.
Given -
A car moving on a straight road at 5 m/s.
It is accelerated at 3 m/s^2.
The first equation of motion is,
v = u + at
It gives the velocity acquired by a body in time t.
Here,
initial velocity = u
acceleration = a
time = t
final velocity = v
Therefore, now putting up the values.
v = u + at
→ u = 5 m/s
→ a = 3 m/s²
→ t = 4 sec
⇒ v = 5 + 3 × 4
⇒ v = 5 + 12
⇒ v = 17 m/s.
Thus, the initial velocity of the car is 17 meters per second.
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you watch a giant spider crawling across your bedroom floor at 630 ft/hr. your bedroom is 15 ft wide. how long did it take the spider to travel
The time taken for the giant spider traveling at 630 ft/hr to travel through your bedroom that is 15 ft wide is 42 hours
How do I determine the time taken for the spider to travel?Speed is defined as the distance travel over a given time. Mathematically, it is written as:
Speed = Distance / time
Making time the subject of the formula, we have:
Speed = Distance / time
Cross multiply
Speed × time = Distance
Divide both sides by speed
Time = Distance / speed
Apply the above formula, we can obtain the time taken from the spider to travel through your bedroom. Details below:
Speed of giant spider = 630 ft/hrDistance travel = 15 ftTime taken to travel =?Time = Distance / speed
Time = 630 / 15
Time = 42 hours
Thus, we can conclude that the time taken for the giant spider to travel is 42 hours
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a basketball player is getting ready to jump, pushing off the ground and accelerating upward.
A. Draw a motion diagram for her motion while she is still in contact with the floor. B. Draw a force identification diagram while she is still in contact with the floor C. Draw a free body diagram while she is still in contact with the floor. D. Draw a free body diagram for after she leaves the floor.
(A) show the progression of her motion over time, (B) show the forces acting on the player's body, (C) The force of the ground pushing against her feet, (D) These forces would include her weight (directed downward), and air resistance (directed upward).
A. A motion diagram for the basketball player's motion while she is still in contact with the floor would show her starting at a stationary position, then accelerating upward as she pushes off the ground. The diagram would show the progression of her motion over time, including her velocity and acceleration.
B. A force identification diagram while she is still in contact with the floor would show the forces acting on the player's body, including her weight (which would be directed downward), the force of the ground pushing against her feet (directed upward), and the force she exerts on the ground (directed downward).
C. A free body diagram while she is still in contact with the floor would show the basketball player as a single point or object, with arrows pointing in the direction of the forces acting on her body. These forces would include her weight (directed downward), the force of the ground pushing against her feet (directed upward), and the force she exerts on the ground (directed downward).
D. A free body diagram for after she leaves the floor would show the basketball player as a single point or object, with arrows pointing in the direction of the forces acting on her body. These forces would include her weight (directed downward), and air resistance (directed upward). Once she leaves the ground, she is no longer in contact with the floor, so the ground reaction force would no longer act on her.
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The frequency is slowly increased. Once it passes the critical value fb , the student hears the ball bounce. There is now enough information to calculate g. What is g ? express the magnitude of the acceleration due to gravity in terms of fb and a.
As the ball's critical frequency rises, the bounce speed gradually accelerates.
g = acceleration
= A[tex]w^2[/tex]
=[tex]A(2p\pi fb)^2[/tex].
The slow-increasing g stands for the ball's gravitational acceleration.
The acceleration of an object in free fall in a vacuum is known as the gravitational acceleration. This is the constant acceleration brought on just by the gravitational pull.
Let's assume that fb is the ball's crucial frequency and that A is its amplitude. The ball's gravitational acceleration can be expressed as follows at a certain point. In this case, the frequency of the ball's bounce affects the acceleration of the ball.
Therefore, we can infer that as fb increases, the bounce speed increases gradually.
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what is the sum of the kinetic and potential energies of particles in an object called? rotational energy
The sum of the kinetic and potential energies of particles in an object called mechanical energy.
What is mechanical energy?Mechanical energy is the energy possessed by an object due to its motion or due to its position. This energy is derived from the work done on an object.
It can be in the form of kinetic energy, the energy of motion; or in the form of potential energy, the energy an object has due to its position or shape.
Mechanical energy can be converted between the two forms, and is often converted into other forms, such as electrical energy or thermal energy.
Mechanical energy is used to power machines and devices, and is an important source of energy in the modern world.
Therefore, The sum of the kinetic and potential energies of particles in an object called mechanical energy.
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Pressure in the Ocean The pressure at 10 m below the surface of the ocean is about 2.00x105 Pa Part A Which of the following statements is true? You did not open hints for this part. ANSWER Part B Now consider the pressure 20 m below the surface of the ocean. Which of the following statements i true? You did not open hints for this part. ANSWER The weight of a column of seawater 1 m2 in cross section and 10 m high is about 2.00x105 N The weight of a column of seawater 1 m2 in cross section and 10 m high plus the weight of a column air with the same cross section extending up to the top of the atmosphere is about 2.00x10s N The weight of 1 m3 of seawater at 10 m below the surface of the ocean is about 2.00x 105 N The density of seawater is about 2.00x105 times the density of air at sea level
The weight of a column of seawater 1m² in cross sectional and 10 m high plus the weight of a column so air with the same cross sectional extending up to the top of the atmosphere is about 2.00×10⁵ N .
What is absolute pressure?Absolute pressure is defined as the pressure present in a space that is completely devoid of all substances, or a vacuum. This absolute zero serves as the reference point for calculations of absolute pressure. Barometric pressure measurements are the best illustration of an absolute referenced pressure.
The absolute pressure at 10m depth,
P = F/A
P = 2.00×10⁵ N/(1m²)
P = 2.00×10⁵ Pa.
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2.2 Represent and Reason Blocks 1 and 2 are suspended from the ends of a light string hung over two very light pulleys. If blocks 1 and 2 are of equal mass predict what will happen if they are released from the same vertical position. From different positions
The equal mass of blocks are released from the same vertical position does not produce tension whereas, released from different position causes acceleration due to tension developed in the string.
Does a string's tension produce any results?An internal force is responsible for the string's tension. Due to the fact that it has no impact on the system, it need not be taken into account. If the string were extensible, it would be necessary to account for this force, for example by incorporating the elastic potential energy the string contains.
What does a pulley block mean?Several pulleys or sheaves installed on a single frame make up a block. Tackle is a grouping of blocks with a rope woven through the pulleys. Reeving is the process of threading cables or ropes through obstacles, and a threaded block and tackle is referred to as "rove."
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a bullet with mass 60.0 g is fired with an initial velocity of 575 m/s from a gun with mass 4.50 kg. the speed of the recoil of the gun is (2 points)
A bullet with mass is fired with an initial velocity from a gun with a mass of 4.50 kg the speed of the recoil of the gun is -7.67 m/s.
Given information:
Mass, (m) = 60.0 g,
velocity, (v) = 575 m/s,
Mass, (M) = 4.50 kg,
The speed of the recoil of gun V is calculated by the conservation of momentum:
momentum conservation:
0 = mv + MV
Rearrange:
V = (-mv) ÷ M
V = (-60 × 575) ÷ (4500)
V = -7.67 m/s
Here negative means the direction is opposite to v.
Therefore, The speed of the recoil of the gun is -7.67 m/s.
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calculate the height (in m) of a cliff if it takes 2.36 s for a rock to hit the ground when it is thrown straight up from the cliff with an initial velocity of 8.05 m/s. (enter a number.) 8.312 correct: your answer is correct. m (b) how long (in s) would it take to reach the ground if it is thrown straight down with the same speed? (enter a number.)
The time would it take to reach the ground if it is thrown straight down with the same speed is found to be 2.36sec
What do the first and second laws of motion mean?The velocity-time relation refers to the first motion equation, v = u + it. On the other hand, the position-time relation is denoted by the second equation of motion, s = ut + 1 / 2at2. The third equation of motion, v2 = u2+ 2as, is also referred to as the position-velocity relation.
S-(ut )-1/2 at2 =0
a=g=> -9.8m/s2
S=> 8.05x2.36 -9.8/2 x (2.36)2
S = -8.32m
S-(ut )-1/2 at2 =0
0 = -9.8 t2/2 +8.05t + 8.32
solve quadratic equation online
t=> 2.36sec
How is acceleration determined?The equation a = v/t denotes acceleration (a), which is the change in velocity (v) over the change in time (t). This enables you to calculate the change in velocity in metres per second squared (m/s2).
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if you walked at an average speed of 1.2 m/s, how long would it take to cross a road that is 16-m wide?
If you walked at an average speed of 1.2 m/s, 13.3 s long would it take to cross a road that is 16-m wide.
What is speed ?
The rate of a directionally changing object's location. The distance travelled divided by the time required to travel that distance is the definition of speed. Speed is a scalar quantity because it only has an angular component and no magnitude.
What is velocity ?
An object's velocity is a key factor in determining its position and rate of motion. It is comprehensible as the distance an object moves in a single interval of time. The term "velocity" describes how far an object travels in a predetermined length of time.
T = D/S = 16m/1.2m/s = 13.3 s
Therefore, If you walked at an average speed of 1.2 m/s, 13.3 s long would it take to cross a road that is 16-m wide.
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One airplane carries a charge of -5.0 C and another airplane carries a charge of 1.0 C. The
magnitude of the electric force between them is 6.0 × 10³ N.
Calculate the distance between these two charged objects.
The distance between two airplanes that carry charges will be by coulombs law 28.83 meters.
What is Coulomb's law?An electric force is produced when two charged particles are present. The forces will be greater if you have larger charges. These two concepts, along with the knowledge that charges can attract and repel one another, can help you comprehend Coulomb's Law. The equation calculates the electrical forces acting on two objects.
What are the three electrical charge laws?Three guidelines to keep in mind when dealing with charges: Positive charges push away one another. Repulsion between negative charges. Charges that are in opposition to one another attract.
we know that from coulombs law;
F=(q1*q2)/r^2
q1= -5.0 c
q2=1.0 c
F= 6*10^3
from the above formula,
r^2=(q1*q2)/F
r= 28.83 meters
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a ball is released from rest from the twentieth of a building. after , the ball has fallen one such that it is directly outside the nineteenth- window. the are evenly spaced. assume air resistance is negligible. what is the number of the ball would fall in after it is released from the twentieth ?
A ball released from rest from the twentieth floor of a building, after 3 s falls 9 floors, considering they are evenly spaced.
A ball is released from rest from the twentieth floor of a building. It experiences a uniformly accelerated rectilinear motion. We can find the displacement after 1 s using the following kinematic equation.
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Our sun's 5800 K surface temperature gives a peak wavelength in the middle of the visible spectrum.
What is the minimum surface temperature for a star whose emission peaks at some wavelength less than 400 nm? that is, in the ultraviolet?
Therefore, the minimum surface temperature for a star whose emission peaks at a wavelength less than 400 nm is around 7248 K.
Calculation-the minimum surface temperature of a star whose peak emission is in the ultraviolet, with a wavelength less than 400 nm.
The ultraviolet region of the spectrum is between about 10nm and 400nm, so for a wavelength of 400nm, we can use Wien's law to find the temperature:
400 x 10^-9m = 2.898 x 10^-3m K / T
T = 2.898 x 10^-3m K / (400 x 10^-9m)
T = 7248K (approximately)
What are its wavelength and frequency?The wavelength, which will also apply to troughs, is the separation between two wave crests. The frequency is measured in cycles per second (Hz), which is the quantity of vibrations that cross a specific area in a second (Hertz). In this article, the relationship between wavelength and frequency is covered.
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pollux, one of the brightest stars in the night sky, is 33.7 light-years from earth. if one light-year is 6,000,000,000,000 miles, about how many miles is pollux from earth? write answer in scientific notation, rounding to two decimal places.
According to the question, Pollux is approximately 2 x 1014 kilometers, or 34 light years, away from the Earth.
What is the length of a light-year?
A light-year measures distance rather than time (as the name might imply). A light-year is the distance a light beam travels in one year on Earth, which is around 6 trillion miles (9.7 trillion kilometers).
Do light years have 365 days?
The distance that light travels in a year is called a light year (365 days). Because "year" is right there in the name, it is frequently used incorrectly as a measure of time. Light will always need one year to traverse one light year.
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a. your tires ride on the surface of the water like a water ski. b. the chassis lifts slightly, giving you a floating sensation when traveling at high speeds. c. you overextend the g-force in a turn. d. you go over a bump in the road too fast, and the vehicle goes slightly airborne.
Energy is you go over a bump in the road too fast, and the vehicle goes slightly airborne.
What type of skin occurs when your front tires lose contact with the road surface?When your vehicle's tires lose traction with the road surface, it is hydroplaning. If you're driving in the rain and there's more water on the road than your tires can safely push away, you could find yourself unable to control the steering, speed and braking of your vehicle.
What is the best method in increasing traction in the snow?You'll get the best traction by straightening the wheel, so do this as much as your parking situation allows. Put your vehicle in the lowest gear. If you've got a four-wheel drive SUV or pickup, engage the low-range gearing. Move forward just a bit.
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Now suppose Bx>0 , and another electron is projected in the same manner. Which of the following is the most accurate qualitative description of the electron's motion once it enters the region of nonzero magnetic field
The right response, based on the provided statement, is that the electron travels in the x direction at a consistent speed along a helical route centred on an axis corresponding to the field lines.
What does an electron mean simply?A opposite charges new particle known as an electron can either be free or attached to an atom (not bound). One of the three main types of molecules within an atom is an ion that is bonded to it; the other other are protons and nuclei.
What does a scientific electron mean?A tiny, negatively charged particle that exists in every atom. Radiation therapy can make use of electron streams produced by specialised equipment.
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The complete question is-
Now suppose Bx>0 , and another electron is projected in the same manner. Which of the following is the most accurate qualitative description of the electron's motion once it enters the region of nonzero magnetic field?
a). The electron decelerates before coming to a halt and turning around while always moving along a straight line.
b). The electron's motion will be unaffected. (It will continue moving in a straight line with the same constant velocity.)
c). The electron moves in a circle in the xy plane.
d). The electron moves along a helical path about an axis parallel to the field lines with constant radius and constant velocity in the x direction.
PLEASE HELP NOW!!
A ball is thrown horizontally at 11.5 m/s from the top of a hill 45.2 m high. How far from the
base of the cliff does the ball hit the ground?
The ball will hit the ground 54.4 meters from the base of the cliff. This can be determined using the equation for the horizontal range of a projectile, which is x = vx*t. In this case, vx is 11.5 m/s, and t is the time it takes for the ball to reach the ground. This time can be determined using the equation for the vertical range of a projectile, which is y = vyo*t + 0.5*g*t^2. In this case, vyo is 0 m/s (since the ball is thrown horizontally), g is 9.81 m/s^2, and y is 45.2 m (the height of the cliff). Solving for t gives us 3.86 seconds. Plugging this value into the equation for the horizontal range gives us x = 54.4 m.
50 W of power are used lifting a crate of fruit and 75 seconds. What was the work done lifting?
Answer:
0.667 joules
Explanation:
work = power/Time
50/75
=0.667joules
Drew likes to take the long way to school each morning. He walks 3 blocks west and then 3 blocks north to arrive at the school. Today he is running late and decides go directly to school to save time. (Assume there is nothing obstructing his path.) If one block is 310 feet, how many feet will he travel if he goes directly to school
If one block is 310 feet, he will travel 1,315.21 feet if he goes directly to school.
What is foot?The British imperial and American customary systems of measurement both use the foot as a unit of length (standard symbol: ft). One alternate symbol that is frequently used is the prime symbol, ′. Since the International Yard and Pound Agreement of 1959, one foot is precisely equal to 0.3048 metres. One foot equals 12 inches in both customary and imperial units, while one yard equals three feet.
The "foot" has historically been a component of numerous regional systems of units, including the Greek, Roman, Chinese, French, and English systems. It varied in length from nation to nation, city to city, and occasionally trade to trade. Its length was typically between 250 mm and 335 mm, and it was typically, but not always, divided into 12 inches.
Given that:
Total block in north = 3
Total block in west = 3
1 block = 310 feet
Then,
Total distance in north = 3 × 310 = 930 feet
Total distance in west = 3 × 310 = 930 feet
Distance travelled by Drew = √(Total distance in north² + Total distance in west²)
Distance travelled by Drew = √(930² + 930²)
Distance travelled by Drew = √(864,900 + 864,900)
Distance travelled by Drew = √1,729,800
Distance travelled by Drew = 1,315.21 feet
Thus, If one block is 310 feet, he will travel 1,315.21 feet if he goes directly to school.
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A 4.0-cm-tall object is 80cm in front of a converging lens that has a 40cm focal length.
1. Calculate the image position.
80.0 cm is the position
2. Calculate the image height. Type a positive value if the image is upright and a negative value if it is inverted.
According to the information provided, it is 80 cm away from the converging lens on the other side of the item. The picture is 4 cm tall when inverted, or -4 cm.
Converging and diverging lenses: what are they?Diverging lenses are concave, whereas convergent lenses are convex. Diverging lenses diverge the material falling on their surface rather of focusing it to gather at a single point, whereas convergent lenses converged & focus the light beam to do so. When parallel light beams strike a concave lens, they diverge when they travel through the lens and never come together at a single spot. They are known as diverging lenses for this reason.
Knowing that 1/f = 1/v - 1/u
Therefore u = -80, f = 40, v = 80
As a result, it is 80 cm away from the convergent lens on the opposite side of the object.
The picture is 4 cm tall when inverted, or -4 cm.
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lava hot springs resort in idaho has a 11.5 meter tall diving platform. if you step off the platform, how fast will you be traveling in meters per second when you hit the surface of the water? neglect air drag.
The fast with which lava hot springs travelling in 15.01 m/s when it hit the surface of water.
What do you mean by motion in a gravitational field?When an object moves, it is said to be in motion under gravity since gravity has an impact on the object's vertical motion. Gravity is the force that pulls objects down. Known as acceleration owing to gravity, the earth's gravity pulls the object toward itself with an acceleration.
Height of platform =11.5 m = h
V^2 = U^2 -2gh
initial vlocity U = 0
V^2= - 2 x-9.8m/s x 11.5
= > V= 15.01m/s
What is free fall in motion under gravity?A body is said to be in freefall when it is only being moved by the gravity of the earth. The ball is encountering external push, thereby the motion will intensify. The term "gravitational acceleration" is also used to describe this rate of free fall.
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why doesn't the force of gravity change the speed of a satellite in circular orbit? group of answer choices the force is at a right angle to the velocity. satellites orbit at a height where gravity is essentially zero. the inertia of the fast satellite is so great that gravity can be ignored. air resistance counteracts the effects of gravity.
Since the force of gravity is at an angle to the velocity, a satellite in a circular orbit suffers a change in speed as a result. The ideal selection is A. In physics, a force is an effect that has the ability to change object.
A mass-containing object's velocity or acceleration can be altered by a force (for example, moving from a condition of rest). Force can also be intuitively described as a push or a pull. All objects with mass or energy are attracted to one another through the fundamental physics interaction of gravity (from the Latin gravitas, "weight"). Gravity is by far the weakest of the four fundamental interactions, with a relative strength of about ten times that of the others.
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object a has a charge 1.8 x 10-6 c. object b has a charge -1.0 x 10- 6 c. they are 0.014 m apart. what is the force on a? on b?
The charge of object A is 1.8 x 10-6C. The charge on object B is 1.0 x 10- 6C. Their distance is 0.014 meters. The force is 83N on both A and B.
Given the charge on object A is (Q1) = 1.8 x 10^-6C
The charge on object B is (Q2) = -1.0 x 10^-6C
They are separated at a distance of (r) = 0.014m = 1.4 x 10^-2m
The force of attraction between them is calculated as (F) = kQ1Q2/r^2
where k = 9 x 10^9
Since they are unlike charges they will be attracted to each other.
F = 9 x 10^9 x 1.8 x 10^-6 x 1 x 10^-6 / (1.4 x 10^-2)^2 = 82.6 = 83N
Hence the force on object A and object B is 83N.
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Which of the following is the source of energy driving the circulation pattern labeled C in the diagram
Solar radiation is the source of energy driving the circulation pattern.
What impact does solar radiation have on climate?Changes in solar output have been hypothesized to have an impact on our climate, both directly by altering the pace at which the Earth and atmosphere are heated by the sun and indirectly by altering the mechanisms that cause clouds to form.
What elements influence how much solar energy Earth receives?Insolation, or the quantity of solar radiation received on a certain surface area over a particular period of time, is largely influenced by latitude, climate, and weather patterns. In general, locations with dry climates and lower latitudes get more insolation than other places.
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