Download Kinetic and Potential Energy Test Review

Kinetic and Potential Energy Test Review
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What is the definition of energy?
What type of energy is energy in motion?
What type of energy is stored energy?
What factors affect kinetic energy?
How could you increase the kinetic energy of an object?
What factors affect potential energy?
How can you increase the potential energy of an object?
A bike is coasting down an inclined plane. What types of energy does it have?
A cup is sitting on the kitchen table. What type of energy does the cup have?
A slingshot is pulled back all the way. What type of energy does it have?
A ball is rolling across the floor. What type of energy does it have?
A sports car and an SUV are moving along a road at the same velocity. Which one has more
kinetic energy and why?
What happens to the potential energy and kinetic energy as something falls?
At which point would a roller coaster have the most kinetic energy?
What happens to the kinetic energy during a fall?
At which point would a roller coaster have the most potential energy?
What happens to potential energy during a fall?
At what point in a fall are the potential and kinetic energy the same?
What is the potential energy of a rock that weighs 5 kg and sits on a hill 150m high?
What is the kinetic energy of the same 5 kg rock when it starts to roll down a hill with a velocity
of 3 m/s?
An astronaut with a mass of 150 kg is on a moon and climbs to the top of a 10 m ladder. His
potential energy on that ladder is 6750 J. What is the gravity on this moon?
An object has 400 J of kinetic energy while traveling at 20 m/s. What is the mass of the object?
An object has 980 J of potential energy when on a ledge 10 m from earth. What is its mass?
Questions 24 -28 are using the following picture. The total mass of the roller coaster car and
passengers are 750 kg.
24. At point (a), it is 50 m above the ground.
What is the potential energy at this point?
25. Find the kinetic energy at point b if the cart
is traveling at a speed of 12 m/s.
26. If energy is conserved and the track is
frictionless, what is the kinetic energy at
point (c)?
27. What is the height at point (d) if the potential energy of the cart is 275,625 J?
28. If the kinetic energy of the cart at point (d) is 91,875 J how fast is it going?
Kinetic and Potential Energy Test Review Answers
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What is the definition of energy? The ability to do work
What type of energy is energy in motion? Kinetic energy
What type of energy is stored energy? Potential energy
What factors affect kinetic energy? Mass and velocity
How could you increase the kinetic energy of an object? Increasing the mass or the velocity
What factors affect potential energy? Mass and height
How can you increase the potential energy of an object? Increasing the mass or height
A bike is coasting down an inclined plane. What types of energy does it have? Both kinetic and
potential energies
A cup is sitting on the kitchen table. What type of energy does the cup have? Potential energy
A slingshot is pulled back all the way. What type of energy does it have? Potential energy
A ball is rolling across the floor. What type of energy does it have? Kinetic energy
A sports car and an SUV are moving along a road at the same velocity. Which one has more
kinetic energy and why? The SUV because it has a greater mass
What happens to the potential energy and kinetic energy as something falls? Potential energy
decreases and kinetic energy increases as it falls and gets closer to the ground.
At which point would a roller coaster have the most kinetic energy? At the bottom
What happens to the kinetic energy during a fall? Kinetic energy increases during a fall
At which point would a roller coaster have the most potential energy? At the top
What happens to potential energy during a fall? Potential energy decreases during a fall
At what point in a fall are the potential and kinetic energy the same? Halfway down, the
potential energy will equal the kinetic energy at that point.
What is the potential energy of a rock that weighs 5 kg and sits on a hill 150m high? 7350 J
What is the kinetic energy of the same 5 kg rock when it starts to roll down a hill with a velocity
of 3 m/s? 22.5m/s
An astronaut with a mass of 150 kg is on a moon and climbs to the top of a 10 m ladder. His
potential energy on that ladder is 6750 J. What is the gravity on this moon? 4.5 m/s2
An object has 400 J of kinetic energy while traveling at 20 m/s. What is the mass of the object?
2 kg
An object has 980 J of potential energy when on a ledge 10 m from earth. What is its mass?
10kg
At point (a), it is 50 m above the ground. What is the potential energy at this point? 367,500 J
Find the kinetic energy at point b if the cart
is traveling at a speed of 12 m/s. 54,000 J
If energy is conserved and the track is
frictionless, what is the kinetic energy at
point (c)? 367,500 J (because PE at top = KE
at bottom)
What is the height at point (d) if the
potential energy of the cart is 275,625 J?
37.5 m
If the kinetic energy of the cart at point (d) is 91,875 J how fast is it going? 15.65 m/s