# Potential And Kinetic Energy

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The amount of kinetic energy an object has depends on its
Motion
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This diagram shows a skier moving down a hill Which statement best describes the skier?
The skier has potential and kinetic energy.
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Which set of terms best defines what affects kinetic energy and potential energy, respectively?
Velocity, height
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Which statement best compares potential and kinetic energy?
Only kinetic energy increases when the velocity of an object increases.
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Seema knows the mass of a basketball. What other information is needed to find the ball's potential energy?
acceleration due to gravity and the height the ball reaches
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A roller coaster with a potential energy of 235,200 J sits at the top of a 30 m high hill. What is the mass of the roller coaster? (Formula: PE = mgh)
800 kg
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A sled is at rest at the top of a 2 m high slope. The sled has a mass of 45 kg. The sled's potential energy is (Formula: PE = mgh)
882
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The table shows information about four objects resting at the top of a hill. Four Objects at Rest on a Hill Object Mass (kg) Potential Energy (J) W 50 980 X 35 1,029 Y 62 1,519 Z 24 1,176 Which object is the tallest hill? W X Y Z
Z
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Ella has a mass of 56 kg, and Tyrone has a mass of 68 kg. Ella is standing at the top of a skateboard ramp that is 1.5 meters tall. Which conclusion is best supported by the given information? If Tyrone stands at the top of the same ramp, his potential energy will be less than Ella's. If Tyrone stands at the top of a 1 m high ramp, his potential energy will be greater than Ella's. If Tyrone stands at the top of the same ramp, his potential energy will be the same as Ella's. If Tyrone stands at the top of a 2 m high ramp, his potential energy will be greater than Ella's.
If Tyrone stands at the top of a 2 m high ramp, his potential energy will be greater than Ella's.
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Which factors are used to calculate the kinetic energy of an object? Check all that apply. gravity velocity volume mass height
Mass
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The kinetic energy of a ball with a mass of 0.5 kg and a velocity of 10 m/s is
25
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A car is moving at 12 m/s and has a mass of 600 kg. What is the kinetic energy of the car? 36,300 J 43,200 J 72,600 J 86,400 J
43,200 J
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An object has a velocity of 8 m/s and a kinetic energy of 480 J. What is the mass of the object? 7.5 kg 15 kg 60 kg 120 kg
15 kg
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The table shows information about four students who are running around a track. Motion of Students Student name Mass (kg) Velocity (m/s) Autumn 50 4 Mohammed 57 3 Lexy 53 2 Chiang 64 5 Which statement is supported by the information in the chart? Autumn has more kinetic energy than Chiang. Mohammed has less kinetic energy than Autumn. Lexy has more kinetic energy than Mohammed. Chiang has less kinetic energy than Lexy.
Mohammed has less kinetic energy than Autumn.
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A soccer ball is traveling at a velocity of 50 m/s. The kinetic energy of the ball is 500 J. What is the mass of the soccer ball? 0.1 kg 0.2 kg 0.4 kg 0.5 kg
0.4 kg
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The diagram shows a ball resting at the top of a hill. Which statement best describes the energy in this system? The potential energy in the system is greatest at X. The kinetic energy in the system is greatest at X. Total energy in the system decreases as the ball moves from X to Y. Total energy in the system increases as the ball moves from X to Y.
The potential energy in the system is greatest at X.
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This diagram shows a baseball's motion. Which statement is best supported by the diagram? Kinetic energy becomes potential energy between points R and S. Maximum potential energy is at point P. Maximum potential energy is at point R. Potential energy becomes kinetic energy between points P and Q.
Maximum potential energy is at point R.
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The diagram shows a person holding a bow and arrow. Which will most likely increase the kinetic energy in this system? pulling farther back on the string releasing the string holding the arrow higher decreasing the mass of the arrow
releasing the string
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If the kinetic and potential energy in a system are equal, then the potential energy increases. What happens as a result? Total energy increases. Stored energy decreases. Energy of motion decreases. Total energy decreases.
Energy of motion decreases.
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Olivia is on a swing at the playground. At which point is her kinetic energy increasing and her potential energy decreasing? W X Y Z
X
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Which is occurring when work is being done? Energy is being reverted. Energy is being decreased. Energy is being increased. Energy is being transferred.
Energy is being transferred.
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Four people make observations recorded in the table. Person Observation Georgina A ball falls Amy Bonds between atoms change Wilhelm Breaking the nucleus of an atom causes and explosion Ron Heat moves from hot to cold areas Which best describes what all of the observations have in common? They involve nuclear energy. They involve radiant energy. The involve changes in waves. They involve changes in energy.
They involve changes in energy.
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If Jerome is swinging on a rope and transferring energy from gravitational potential energy to kinetic energy, ________ is being done.
work
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Shondra takes notes in class. I. Electromagnetic Waves II. The ability to work - Has many forms - Mechanical III. Potential energy - Chemical - Elastic - Gravitational Kinetic energy - Energy of movement - Electrical IV. Nuclear - Radiant - Thermal One line of Shondra's notes is irrelevant to the rest of her notes. Which line is about a different topic than the rest of Shondra's notes? I II III IV
I
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The unit for energy is the _______.
joule
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Work can ________ energy between objects and can cause a change in the form of energy.
transfer
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Which statement best defines the relationship between work and energy? Work can transfer energy between objects and increase radiant energy. Work can transfer energy between objects and cause a change in the form of energy. Work can transfer energy between objects and decrease nuclear energy. Work can transfer energy between objects and cause a change in the amount of total energy.
Work can transfer energy between objects and cause a change in the form of energy.
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Gabriel is performing an experiment in which he is measuring the energy and work being done by a ball rolling down a hill. Which statement best describes Gabriel's measurements? They will remain constant. They will both be recorded in joules. They will both be recorded in hertz. They will involve compressions.
They will both be recorded in joules.
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When a spring is compressed, the energy changes from kinetic to potential. Which bestdescribes what is causing this change? work power gravitational energy chemical energy
work
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Abin is doing work by lifting a bowling ball. Which statement could be made about the energy in this situation? It is being transferred from the ball to his arm muscles. It is being transferred from his arm muscles to the ball. It would be recorded in units of hertz and power. It would be cause a change in energy from potential to chemical.
It is being transferred from his arm muscles to the ball.
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Which statement best describes the work and energy in these examples? Example 1: Running a car requires gas. Example 2: Humans require food to live. The gas and food are examples of energy. The gas and food are examples of work. The gas and humans are examples of work. The food and car are examples of energy.
The gas and food are examples of energy.
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_______ energy is the energy of an object has because of its motion?
Kinetic
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What is the energy of an object because of its potential and kinetic energies? chemical energy electrical energy nuclear energy mechanical energy
mechanical energy
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What are two types of mechanical energy? electrical and kinetic nuclear and chemical radiant and thermal elastic and gravitational
elastic and gravitational
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What kind of energy involves the flow of positive charges? thermal radiant electrical nuclear
electrical
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Johanna is studying what happens to the energy as a ball rolls down a ramp. What is she studying? Check all that apply. gravitational potential energy electrical energy kinetic energy mechanical energy elastic potential energy