A block of mass m is launched by a spring of negligible mass along a horizontal surface of negligible friction. The spring constant of the spring is k. The spring is initially compressed a distance x₀. The block is released from rest. Some time after the block is released and travels in the direction shown in the figure, the spring compression is [tex]x_f[/tex]. Which of the following mathematical calculations can a student use to determine the speed [tex]v_f[/tex] of the block at this new position?
Answers
the spring constant of the spring is k. the spring is initially compressed a distance x0. the block is released from rest.
What is distance and velocity?Velocity is the measure of the amount of distance an object covers in a given amount of time. Here's a word equation that expresses the relationship between distance, velocity and time: Velocity equals distance travelled divided by the time it takes to get there.
Is distance equal to speed?Speed = Distance/Time – This tells us how slow or fast an object moves. It describes the distance travelled divided by the time taken to cover the distance. Time = Distance / Speed, as the speed increases the time taken will decrease and vice versa.
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Related Questions
You are now about to make a Collage showing the different interactions that exist among organisms. Then, in 3-5 sentences explain the following
1. One of the interactions that exist in the environment.
2. Effects of your chosen interaction among organisms in their environment.
3. Cite an example to support your chosen interaction.
Answers
Answer:
1. One of the interactions that exist in the environment is symbiosis. Symbiosis is a type of interaction between two or more organisms where one organism benefits and the other organism is neither helped nor harmed.
2. Symbiosis can have a positive effect on the environment. For example, mutualistic symbiosis, where both organisms benefit, can increase the survival and reproduction of both species. This can increase biodiversity and stability in the ecosystem.
3. An example of mutualistic symbiosis is the relationship between bees and flowers. Bees collect nectar from flowers and in the process, they transfer pollen, which allows the flowers to reproduce. The bees benefit by getting food and the flowers benefit by getting pollinated. This relationship is essential for the survival of both bees and flowers and contributes to the biodiversity of the ecosystem.
whether or not an object (such as a plate, glass, or bone) breaks upon impact depends on the average force exerted on that object by the surface. when a 1.3 kg glass figure hits the floor, it will break if it experiences an average force of 348 n. when it hits a tile floor, the glass comes to a stop in 0.013 s. from what minimum height (in m) must the glass fall to experience sufficient force to break?
Answers
Minimum height is approximately 0.35 meter to experience sufficient force to break.
Let's use the following equation to calculate the glass figure's acceleration.
F = m * a
-712 = 3.8 * a
a = -712 ÷ 3.8
This is equivalent to -187 m/s2. Let's use the equation below to calculate the glass figure's speed shortly before the force was applied.
vf = vi + a*t
0 = vi + (-712 ÷ 3.8) * 0.014
vi = (712 ÷ 3.8) * 0.014
This is equivalent to 2.62 m/s. Let's use the equation below to calculate how far the glass figure must fall for it to reach this velocity.
Vi = 0 m/s, and vf2 = vi + 2 * g + d
[(712 ÷ 3.8) * 0.014]^2 = 2 * 9.8 * d
d = [(712 ÷ 3.8) * 0.014]^2 ÷ 19.6
This is approximately 0.35 meter.
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What types of energy transformation take place in battery operated radio?
Answers
Explanation:
In a battery-operated radio, energy is transformed from chemical energy stored in the batteries to electrical energy, which is then used to power the radio's electronic components and produce sound through the speakers. The electrical energy from the batteries is used to power the radio's circuits and drive the movement of the speakers' diaphragm, which produces sound waves. This process is known as electro-mechanical energy transformation.
Answer:
from mechanical to sound energy
a person in a car during a sudden stop can experience potentially serious chest injuries if the combined force exerted by the seat belt and shoulder strap exceeds 16,000 n. describe what it would take to avoid injury by estimating (a) the minimum stopping time interval and (b) the corresponding stopping distance, assuming an initial speed of 16 m/s. indicate any other assumptions you made.
Answers
minimum time interval to stop should be = 0.08 seconds whereas the friction minimum stopping distance = 0.64 m.
Which four forms of friction are there?
The force that prevents one solid item from moving across another is known as friction. Static friction, sliding friction, rolling friction, and fluid friction are the four main categories of friction.
What is frictional force, exactly?
Two surfaces that come into contact and glide against one another produce frictional force. The following variables impact the frictional force: Surface roughness and the amount of force pressing them together have the biggest an impact on these forces.
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A 60 cm diameter wheel accelerates from rest at a rate of 7 rad/s2. what is the tangential acceleration of a point on the edge of the wheel?
Answers
The tangential acceleration of a point on the edge of the wheel is calculated to be 2.1 m/s².
By definition, the angular acceleration, is equal to the rate of change of the angular velocity, ω:
α = Δω / Δt ----(1)
The linear velocity, v, can be expressed as follows using the definition of the angular velocity,
v = ω × r
⇒ Δv = Δω × r ----(2)
Putting Δω, in place of (1) in (2) gives us,
Δv = α × Δt × r
⇒ Δv/Δt = α × r ----(3)
Expression of linear acceleration, can be written as,
a = α × r
For a point on the edge of the wheel, the linear acceleration is tangent to the rim, and is equal to the product of the angular acceleration times the distance to the centre, which for a point on the edge of the wheel, is just the radius,
⇒ a = 7 rad/sec² × 0.3 m = 2.1 m/s²
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find μs, the coefficient of static friction between the rod and the rails. A rail gun uses electromagnetic forces to accelerate a projectile to very high velocities The basic mechanism of acceleration is relatively simple and can be illustrated in the following example. A metal rod of mass 20.0 g and electrical resistance 0500 1 rests on parallel horizontal rails that have negligible electric resistance. The rails are a distance L = 800 cm apart. (Figure 1) The rails are also connected to a voltage source providing a voltage of V = 500 V. The rod is placed in a vertical magnetic field. The rod begins to slide when the field reaches the value B = 0.123 T . Assume that the rod has a slightly flattened bottom so that it slides instead of rolling. Use 9.80 m/S^2 for the magnitude of the acceleration due to gravity.
Answers
The coefficient of static friction between the rod and the rails is 502.04.
What is the formula for static friction coefficient?The resistive force of friction (Fr), which pushes the objects together, is divided by the normal or perpendicular force (N), which pushes them apart, to produce the coefficient of friction (fr), which is a numerical value. The following formula used, fr = Fr/N.
Given,
Mass of metal rod = 20.0 grams to kg = 0.02 kg
Resistance = 0.5 Ohms
Distance, L = 800 cm to m = 0.8 m
Voltage = 500 Volts
Magnetic flux, B = 0.123 Tesla
Use Gauss's law of magnetic field,
We would first measure the current passing through the rails,
Current = voltage/resistance
Current = 500/0.5
Current = 1000Amps.
The following formula describes the magnetic force acting on a current-carrying conductor,
Fm = BIL
Fm = 0.123×1000×0.8
Fm = 98.4N
The metal rod's limiting frictional force is given by,
Fr = µmg
Additionally, before the metal rod begins to move, the magnetic force must be equal to the limiting frictional force,
Fm = Fr
98.4 = µmg
98.4 = µ × 0.02×9.8
98.4 = µ× 0.196
µ = 98.4/0.196
µ = 502.04.
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1. suppose an mp air mass moving eastward from the pacific ocean travels across the united states. describe all of the modifications that could take place as this air mass moves eastward in winter.
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Eastward moving air mass across the US in the winter may cool, pick up moisture and pollutants, and interact with other weather systems, leading to changes in temperature, humidity, precipitation and wind patterns.
As an air mass moves eastward from the Pacific Ocean across the United States in the winter, several modifications could take place. The air mass may cool as it moves over land, causing any moisture present to condense and potentially leading to precipitation.
Additionally, the air mass may pick up moisture from bodies of water such as lakes and rivers, increasing its humidity. As the air mass moves over different types of terrain and land cover, it may also pick up pollutants from human activities such as industrial emissions and automobile exhaust.
The air mass may also interact with other weather systems, such as cold fronts or high pressure systems, which could further modify its temperature, humidity, and wind patterns.
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two objects, with masses m1 and m2, attract each other with force f. if the mass of m1 increased by a factor of two then the new gravitational force would be:
Answers
The new gravitational force between them would be twice the initial gravitational force.
What is Newton's law of universal gravitation?Newton's law of universal gravitation states that the force of attraction between two object in the universe is directly proportional to the product of their masses and inversely proportional to the square of the distance between the two objects.
Mathematically, the formula for Newton's law of universal gravitation is given as;
F = ( Gm₁m₂ ) / ( R² )
where;
m₁ is the mass of the first objectm₂ is the mass of the second objectR is the distance between the two objectsG is universal gravitation constantWhen mass m1 of the two objects doubles, the new gravitational force will be calculated as;
F' = ( G x 2m₁ x m₂ ) / ( R² )
F' = 2( Gm₁m₂ ) / ( R² )
F' = 2F
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Contain(s) an objective description of the murder victim.
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The murder victim was a white male in his early thirties, approximately 5 feet 8 inches tall with a thin build and brown hair.
What is victim?A victim is a person who has been harmed, either physically or emotionally, as a result of another person's actions or inaction. Victims may suffer physical injuries, psychological trauma, and/or financial losses. Victims also experience feelings of powerlessness, fear, anxiety, and anger. Victims of crime often feel a deep sense of injustice, which may manifest in the form of post-traumatic stress disorder, depression, or other psychological distress. Victims may also experience social stigma, which can have a long-term impact on their lives. Victims of crime may also have difficulty accessing justice and finding support to help them cope. It is important for victims of crime to have access to a range of services that can provide them with appropriate assistance and support.
He was wearing a white t-shirt and jeans at the time of his death. He had several stab wounds to his torso and a deep cut to his throat.
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what is the gauge pressure at a depth of 6 cm in a glass filled with 4 cm of mercury and 4 cm of water? water has a density of 1000 kg/m3, and mercury has a density 13.6 times as great.
Answers
h₂ = P/ρ₂g = 85299.2 Pa/(1000 kg/m³ × 9.8 m/s²) = 85299.2 Pa/9800 kg/m ²s² = 8.7 m
How does mercury become made?About 4.5 trillion years ago, gravity brought together spinning gas and debris to create Mercury, the small planet closest to the Sun. Mercury has a solid crust, a steep slope, and a central core, just like its sibling terrestrial planets.
Calculation
The pressure due to the mercury of height h = 64 cm = 0.64 m is
P = ρ₁gh₁ where ρ₁ = density of mercury = 13600 kg/m³
P = 13600 kg/m³ × 9.8 m/s² × 0.64 m = 85299.2 Pa
Since this is the same pressure for the water,
P = ρ₂gh₂ where ρ₂ = density of water = 1000 kg/m³ and h₂ = height of
water
h₂ = P/ρ₂g = 85299.2 Pa/(1000 kg/m³ × 9.8 m/s²) = 85299.2 Pa/9800 kg/m ²s² = 8.7 m
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earth and jupiter both travel in a roughly circular orbit around teh sun. jupiter's orbit is approximately 5 times the radius of the earth's orbit. what is the approximate relationship between the centripetal acceleration of each planet?
Answers
The orbit of Jupiter has a radius that is roughly five times that of the earth. the centripetal acceleration of Jupiter will be (v^2 / 5r) which is 1/5th the acceleration of Earth.
What is the moon's net gravitational field as a result of the sun and Earth?zero
The intersection of the gravitational fields of the Sun, Earth, and Moon is known as the neutral point because it is where the combined gravitational pull of the three bodies is zero. About 80 times as much mass as the Moon is the Earth.
The centripetal acceleration of a planet in a circular orbit is given by the formula: a = v^2 / r, where a is the acceleration, v is the velocity of the planet, and r is the radius of the orbit. Since Jupiter's orbit is approximately 5 times the radius of Earth's orbit, the radius of Jupiter's orbit is 5r.
Since the velocity of both planets is roughly the same (as they both travel in roughly circular orbits around the Sun), the centripetal acceleration of Jupiter will be (v^2 / 5r) which is 1/5th the acceleration of Earth.
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when a building load, or force, acts on a building component, such as a column, the component takes on an internal resistance to the force known as .
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When a building load, or force, acts on a building component, such as a column, the component takes on an internal resistance to the force known as stress. .
What is stress?Stress is a measure of the internal resistance of a material to applied forces. It is calculated as the force per unit area. Stress can cause a building component to bend, stretch, or compress, and can ultimately lead to failure if the stress exceeds the material's strength.
What are the types of stress?There are two types of stress: tensile stress and compressive stress. Tensile stress is the stress that causes a material to stretch, while compressive stress causes a material to shrink or compress. Additionally, shear stress is a type of stress that causes a material to slide or deform along a plane, it's usually found in structures such as bridges, buildings, and towers.
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a roller-coaster's largest drop is 50.0 meters. assuming it starts from rest, what is the speed of the car (in m/s) at the bottom of this drop?
Answers
The speed of the car at the bottom of the drop is 980 m/s. The result is obtained by using the concept of conservation of mechanical energy.
What is law of conservation of energy?The principle of conservation of energy states that "The total energy is neither increased nor decreased in any process. Energy can be transformed from one form to another, and transferred from one object to another, but the total amount remains constant."
In the same way, the Conservation of Mechanical Energy states that the total mechanical energy of a system is conserved. It can be expressed as
½mv₁ + mgh₁ = ½mv₂ + mgh₂
Where
E₁ = mechanical energy at point 1E₂ = mechanical energy at point 2m = mass of an objectv₁ = velocity of object at point 1v₂ = velocity of object at point 2h₁ = height of object at point 1h₂ = height of object at point 2A roller coaster's largest drop is 50.0 m starts from the rest. Find the speed at the bottom of that drop!
The case is similar to an object falling down without initial speed.
We have
h₁ = 50.0 mv₁ = 0At the bottom of the drop, the height is zero. So, h₂ = 0.
The speed of the car at the bottom would be
½mv₁ + mgh₁ = ½mv₂ + mgh₂
0 + 9.8(50) = ½v₂ + 0
490 = ½v₂
v₂ = 490 × 2
v₂ = 980 m/s
Hence, at the bottom of the drop, the speed of the car is 980 m/s.
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1. If the dielectric becomes damaged it can 'break down' like the air does when lightning strikes. What would happen to the charge on the plates?
Answers
Answer:
Explanation:
When the dielectric becomes damaged, it can no longer prevent the charge on the plates from leaking out. This process is known as dielectric breakdown. When the dielectric breaks down, the charge on the plates will begin to dissipate. This can result in a spark or arc, as the charges will be forced to jump the gap and form a conductive path. This can lead to potentially dangerous situations, as the energy released can be quite high. Additionally, the sudden change in the electric field can cause other electrical components to be damaged or destroyed, depending on the amount of energy released.
two forces f1 and f2 are acting on a box shown below causing the box to move to the right across a surface. the two force vectors are drawn to the same scale. which force does more work on the box? justify your answer.
Answers
F1 puts in more effort than F2. The displacement is greater in F1 due to the higher horizontal component.
How come F1 is quicker than F2?Overall, Formula 1 cars are faster and far more powerful than F2 cars. The amount of downforce generated by Formula 1 cars is astounding, reaching up to 5 Gs. Speed has an impact on downforce; when a car moves quicker, more downforce is produced.
What is the force's horizontal component?A force's horizontal component is the portion of the force that acts in a horizontal direction on the body, whereas a force's vertical component is the portion of the force that acts in a vertical direction on the body.
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Gwen is completing a physics investigation involving the speeds of toy cars on a track. Two cars are going to be released from the top of a ramp and timed until they reach the bottom. Before her investigation, Gwen comes up with a hypothesis. She states that toy car A will be faster than toy car B. She runs three trials of her investigation and records her data.
20 POINTS PLSSS help...During her investigation, Gwen is using a reference point to help her in her measurements. What is a reference point used to measure?
A. energy
B. magnetism
C. mass
D. movement
Answers
Magnetism is using a reference point to help her in her measurements.
What is Magnetism?The force that magnets use to either attract or repel one another is known as magnetism.
The force that magnets use to either attract or repel one another is known as magnetism. Electric charges in motion are the source of magnetism.
Atoms, the smallest building blocks of matter, make up every substance. There are electrons in every atom, which are charged particles. The electrons that make up an atom's nucleus, or core, spin like tops.
Therefore, Magnetism is using a reference point to help her in her measurements.
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a coin is fixed in place on a turntable, 0.11 m from the axis of rotation. when the angular speed of the turntable reaches 36 revolutions per minute, the coin slides off. determine the coefficient of static friction between the coin and the turntable.
Answers
We have sg=v2/r v=2rf where f =36/60 s(9.8 m/s2)=(2*.11m*(35/60)) since the masses cancel when Ff =macsmg =mv2/r. 2/0.11m finds = .15 A coin falls off the turntable's static friction force with regard to coin.
What do you call friction?The force of friction is influenced by outside forces. The two elements that friction depends on are as follows: 1. Regarding the makeup of the contact objects in touch. The two sides that are in touch with one other's depend on each other for friction.
What makes friction popular?In mathematics, the portion or component of the complete item is represented by a fraction. It stands for the equal components of the whole.
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If a car travels 400m North in 20 seconds, what is its velocity (remember velocity is speed with
direction)
Answers
The velocity of the car which travels 400 meters towards north in 20 seconds is 20m/s.
What is Velocity?Velocity is the directional speed of an object which is under motion as an indication of the rate of change in the position which is observed from a particular frame of reference by the observer and it is as measured by a particular standard of time as well. It is a vector quantity as it has both the magnitude and direction. The SI unit of velocity is meter per second (m/s).
The velocity of the car can be calculated by the formula:
Velocity = Displacement / time
Displacement = 400 m towards north direction
Time = 20 seconds
Velocity = 400m/ 20 sec
Velocity = 20m/s
Therefore, the velocity of the car is 20m/s.
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the allowed energies of a quantum system are 0.0 eV, 1.5 eV, 3.0 eV and 6.0 eV. How many different wavelengths appear in the emission spectrum
Answers
The emission spectrum of this system will contain four different wavelengths, corresponding to each of the allowed energies.
What is wavelentgh?Wavelength is a measure of the distance between two consecutive wave crests or troughs and is usually defined as the length of one full cycle of a wave. Wavelengths are typically measured in meters, centimeters, or nanometers (10-9 meters). Wavelength is inversely related to frequency, meaning that higher frequency waves have shorter wavelengths.
The wavelength of each energy level can be calculated using the equation λ = hc/E, where h is Planck's constant, c is the speed of light, and E is the energy level in electron volts. Using this equation, the four wavelengths of the emission spectrum are calculated as follows: 0.0 eV = 0.0 m, 1.5 eV = 8.0 x 10^-7 m, 3.0 eV = 4.0 x 10^-7 m and 6.0 eV = 2.0 x 10^-7 m. Thus, the emission spectrum of this system will contain four different wavelengths, which can be identified by their corresponding energy levels.
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what is bout, the z component of the magnetic field outside the solenoid?
Answers
The magnetic field in the Z component which is outside the solenoid is zero.
The magnetic field lines are present outside the solenoid, but there are significantly less of them there than there are inside the solenoid. This is known as the flux. As a result, the magnetic field outside is thought to be almost nil. It is more accurate to assume that the magnetic field outside the solenoid is zero if the solenoid is quite long. It is false close to the solenoid's edge. We consider the magnetic field outside the solenoid to be zero for practical purposes. This amount of flux divided by the area outside the solenoids gives the flux density, which is equal to the strength of the field outside the solenoid is zero.
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the diameter of mars is about 1/2 the diameter of earth and its mass is about 1/10 the mass of earth. find the gravitational acceleration on the surface of mars.
Answers
The gravitational acceleration on the surface of mars is 3.71 m/s²
What is gravitational acceleration?
Gravitational acceleration is the rate at which an object accelerates when it is subjected to a gravitational force. It is usually denoted by the symbol g and is represented by the equation g = GM/r2, where G is the universal gravitational constant, M is the mass of the object, and r is the distance between the object and the attracting body.
Gravitational acceleration (g) = (Gravitational Constant * Mass of Mars) / (Radius of Mars)^2
g = (6.67 x 10^-11 m^3 kg^-1 s^-2 * 6.39 x 10^23 kg) / (3.38 x 10^6 m)^2
g = 3.71 m/s^2
Therefore, The gravitational acceleration on the surface of mars is 3.71 m/s²
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when a person abducts the shoulder to 90 degrees, then moves the arm backward, what is that motion called
Answers
When a person abducts the shoulder to 90 degrees, then moves the arm backward, that motion called horizontal abduction.
The transverse plane movement of the arms away from the body's midline is known as horizontal abduction. Consider lowering the pec fly as an example. Higher ball velocity has been linked to greater horizontal abduction during foot impact.
The movement of the arms across the body in a horizontal plane is known as horizontal abduction. Moving in the transverse plane, starting with the arms straight to the front (shoulders flexed at 90 degrees), and ending with the arms straight out to the side (flexed at 90 degrees).
Arm abduction is the coronal plane movement of the arm away from the midline of the body, and unilateral abduction is typically possible between 160° and 180°.
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002 10.0 points
A figure skater begins spinning counterclockwise at an angular speed of 4.0 π rad/s. During a 4.4 s interval, she slowly pulls her arms inward and finally spins at 7.8 T rad/s. What is her average angular acceleration
during this time interval?
Answer in units of rad/s².
Answers
Answer:
0.86 rad/s² counterclockwise
Explanation:
Average angular acceleration is change in angular velocity over time.
α = (ω − ω₀) / t
α = (7.8π rad/s − 4.0π rad/s) / 4.4 s
α = (3.8π / 4.4) rad/s²
α = 0.86 rad/s²
A child is pushing a merry-go-round. The angle through which the merty-go-round has turned varies with time according to θ(t)-7t + 3 where γ = 0.367 rad/s and 140-10-2 rad/sCalculate the angular velocity of the merry-go-round as a function of time Express your answer in terms of the variables β, γ, and t. Part BWhat is the initial value of the angular velocity?Part CCalculate the instantaneous value of the angular velocty w, at t 550 rad/s Part DCalculate the average angular velocity wfor the time interval t = 0 to t = 5.50s
Answers
Now, 0.65 rad/s and 0.7 rad/s are different. Average angular velocity is defined as total displacement divided by total displacement time.
What is the straightforward meaning of velocity?
The displacement that an object or particle experiences with respect to time is expressed vectorially as velocity. The meter per second (m/s) is the accepted unit of velocity magnitude (also known as speed).
How do velocity and speed differ?
Velocity is the pace and direction of an object's movement, whereas speed is the time rate at which an object is travelling along a path. In other words, velocity is a vector, whereas speed is a scalar value.
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The initial value of the angular velocity is -6.633 rad/s. The instantaneous value of the angular velocity is -3.817 rad/s.
What is the simple definition of velocity?In terms of time, an object or particle's movement is expressed vectorially as velocity. The recognized measurement of velocity magnitude is the meter per second (m/s) (also known as speed).
Part A:
The angular velocity of the merry-go-round as a function of time is the derivative of the angle with respect to time.
Angular velocity, w(t) = dθ(t) / dt = -7 + 0.367
Part B:
The initial value of the angular velocity is the value of the angular velocity at t = 0.
w(0) = -7 + 0.367 = -6.633 rad/s
Part C:
To find the instantaneous value of the angular velocity at a specific time, we need to substitute that time into the angular velocity equation.
w(t) = -7 + 0.367t
w(5.50) = -7 + 0.367(5.50) = -3.817 rad/s
Part D:
To find the average angular velocity for a time interval, we can use the following formula:
average angular velocity = (final angle - initial angle) / (final time - initial time)
Given the time interval t = 0 to t = 5.50s,
average angular velocity = (θ(5.50s) - θ(0)) / (5.50s - 0s)
θ(t) = -7t + 3
average angular velocity = (-7*5.50 + 3 - 3)/5.50 = -7 rad/s
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a student in an electronics lab is studying the electrical properties of pieces of graphite. the student applies a potential difference of 24 v across the length of a cylindrical piece of graphite with a radius of 0.5 mm. the student has another piece of graphite of the same length but with a radius of 0.7 mm. the student wants the same current in both pieces of graphite. what potential difference should the student apply across the 0.7 mm piece?
Answers
The student should apply a 17V potential differential across the 0.7 mm piece.
How may potential differences be found?The potential difference between places A and B is defined as the change in potential energy (PE) of a charge (q) transported from A to B, divided by the charge (V = VB - VA).
The joules per coulomb, sometimes known as volts (V) in honor of Alessandro Volta, are the units of potential difference.
The change in potential energy (PE) of a charge (q) transported from point A to point B, divided by the charge, is thus used to determine the potential difference between points A and B as V = VB - VA.
Volt is the SI unit for electrical potential. V stands for it.
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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?
Answers
Vx = 11.5 m/s
h = 45.2 m
g = 9.8 m/s²
Vi.y = 0 m/s (Initial vertical velocity)
x - ?
Solution:
1. h = Vi.y • t + 1/2 • g • t²
Since Vi.y = 0, we will get: h = 1/2 • g • t²
t = sqrt(2h/g)
t = sqrt(2 • 45.2/9.8)
t = 9.22 sec
2. Vx = x/t
x = Vx • t
x = 11.5 • 9.22 = 106.03 meters
Javier is trying to lift a heavy old television. He is pulling up on the television with a force of 500N. Earth's gravity is pulling down on the television with a force of 500N.
Answers
The statement describes the forces on the television is (A). The forces are balanced, so there is no net force on the television. Javier's pulling force is equal to gravitational force.
How to add the forces inline?The forces that are inline can be added up. The force that has the opposite direction is negative.
We have
The pulling force, Fp = + 500 NThe gravitational force, Fg = - 500 NThe net force would be
∑F = F + Fg
∑F = 500 N + (-500) N
∑F = 0 N
Hence, the forces are balanced and the net force is zero.
Your question is incomplete, but most probably your full question was
Javier is trying to lift a heavy old television. He is pulling up on the television with a force of 500N. Earth's gravity is pulling down on the television with a force of 500N.
Assume all other forces on the television are balanced. Which statement describes the forces on the television?
The answer choices are
(A) The forces are balanced, so there is no net force on the television.
(B) The forces are unbalanced, so there is a net force on the television.
(C) The forces are unbalanced, so there is no net force on the television.
(D) The forces are balanced, so there is a net force on the television.
The answer is (A).
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A particle with mass 1.81 xio-3 kg and a charge of 1.22 times sign 10^-8 C has, at a given instant, a velocity v = (3.00 times sign 10^4 m/s)j. What are the magnitude and direction of the particle's acceleration produced by a uniform magnetic field B=(1.63 T)i+(0.980 T)j?Draw the velocity v and magnetic field B vectors. Since they have different units, their relative magnitudes aren't relevant. Be certain they have the correct orientations relative to the given coordinate system. The dot in the center of the image represents the particle. Recall that i, j, and k are the unit vectors in the x, y, and z directions, respectively.Find the acceleration vector for the charge. Enter the x, y, and z components of the acceleration in meters per second squared separated by commas. A= m/s^2
Answers
The acceleration vector for the charge is -8.892 x [tex]10^4[/tex] m/s² i + 2.17 x [tex]10^4[/tex] m/s² j, and is perpendicular to the plane formed by the velocity vector and the magnetic field vector.
The acceleration of a charged particle in a magnetic field is given by the Lorentz force equation:
F = q(v x B)
The magnitude of the acceleration is:
|a| = |q| |v x B|/m
The direction of the acceleration can be determined using the right-hand rule, which states that when the thumb of the right-hand points in the direction of v and the fingers curl in the direction of B, the extended palm of the hand points in the direction of a.
Given the given values, the acceleration vector will be:
a = q (v x B) / m = 1.22 x [tex]10^{-8}[/tex] C × (3.00 x [tex]10^4[/tex] m/s) x (1.63 T)i + (0.980 T)j / 1.81 x [tex]10^{-3}[/tex] kg = -8.892 x [tex]10^4[/tex] m/s² i + 2.17 x [tex]10^4[/tex] m/s² j
So the acceleration vector for the charge is -8.892 x [tex]10^4[/tex] m/s² i + 2.17 x [tex]10^4[/tex] m/s² j.
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a motor that does 24 000] of work in two minutes
Answers
The power of a motor that does 24 000 J of work in two minutes is 200 watts.
Give a brief account on Power?Power is the rate at which energy is transferred, used, or transformed. It is often measured in units of watts (W) or horsepower (hp). Power can also refer to the ability or capacity to do something, such as the power of a ruler to govern or the power of a machine to perform a specific task. In physics, power is defined as the amount of work done per unit of time.
The power output of that motor would be 24,000 joules per two minutes, or 12,000 joules per minute (24,000/2). To convert to watts, divide by the number of seconds per minute, which is 60. Therefore, the power output of the motor is 200 watts (12,000/60).
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The complete question is:
standing waves on a string suppose that there was a ride at an amusement park that was titled the standing wave. which location - node or antinode - on the ride would give the greatest thrill? why?
Answers
Imagine there existed a rollercoaster called the standing wave at an amusement park, and that the first and last nodes of the ride would provide the greatest thrills.
In physics, a standing wave—also known as a stationary wave—is an oscillating wave in space with a fixed peak amplitude profile. The peak amplitude of the wave oscillations remains constant throughout all of space and time, irrespective of the location. Imagine there existed a rollercoaster called the standing wave at an amusement park. When two waves that are moving in opposing directions superimpose, a standing wave is produced. Two identical waves flow in opposing directions, therefore there is no net change in momentum or energy.
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