Energy Transformations Question Preview (ID: 34655)
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Which of these is an example of kinetic energy?
a) wind blowing
b) water in a glass
c) a can of vegetables
d) the walls of a building
Mechanical energy is the sum of two types of energy—kinetic energy and potential energy of position. Which of the following is an example of an object that has kinetic energy?
a) a snail crawling across a leaf
b) a computer monitor sitting on a desk
c) a tightly wound spring in a windup toy
d) a roller coaster car just before it goes downhill
Which term describes potential energy?
a) stored energy
b) future energy
c) kinetic energy
d) invisible energy
A rock on top of a hill has energy due to its position. What is this energy called?
a) chemical energy
b) kinetic energy
c) gravitational potential energy
d) elastic potential energy
What is the law of conservation of energy?
a) The total amount of energy on Earth is constant.
b) Energy can only be created when a force acts on an object.
c) Heating an object creates energy and cooling destroys energy.
d) Energy cannot be created or destroyed but it can be transformed.
The law of conservation of energy describes how the amount of total energy can change in a closed system. Which of these statements correctly describes this law?
a) The amount of kinetic energy in a system is a constant value.
b) Energy can be converted from one form into another, but it cannot be created or destroyed.
c) An object can have potential energy or kinetic energy, but not both at the same time.
d) The amount of energy created when an object moves is equal to the energy destroyed when it stops moving.
Which of these is an example of the conversion of elastic potential energy into kinetic energy?
a) a person running on a level track
b) an apple falling from a tree to the ground
c) a windup spring making a toy car move across the floor
d) a rubber band that is being stretched to twice its normal length
Which of these is an example of the conversion of gravitational potential energy into kinetic energy?
a) a person running on a level track
b) an apple falling from a tree to the ground
c) a windup spring making a toy car move across the floor
d) a rubber band being stretched to twice its normal length
Which of these is an example of the conversion of kinetic energy into gravitational potential energy?
a) a bicyclist coasting down a long hill
b) a car engine moving the car forward
c) a roller coaster car moving toward the top of a rise in the tracks
d) a thrown ball falling toward the ground after passing through the top part of its motion
Which of the following examples of a cheetah has the most kinetic energy?
a) a cheetah that is resting
b) a cheetah that is running
c) a cheetah that is walking
d) a cheetah that is eating
A ball is sitting at the top of a ramp. As the ball rolls down the ramp, the potential energy of the ball decreases. What happens to the potential energy as the ball moves?
a) It is lost as gravitational energy.
b) It is converted to kinetic energy.
c) It is destroyed as the ball moves.
d) It is used to make the ball slow down.
Gordon throws a baseball into the air. It rises, stops when it reaches its greatest height, and then falls back to the ground. At what point does kinetic energy convert to potential energy?
a) while the baseball is rising
b) when a baseball is falling
c) when a baseball sits on the ground
d) while the baseball is stopped in the air
Ms. Lewis is a chemist mixing two solutions together. A chemical reaction takes place, and the solution becomes warm. Which statement BEST describes what has happened?
a) Energy has been created in the form of heat energy.
b) Energy has been transferred from one form to another.
c) More energy has been created than has been destroyed.
d) The chemical energy of the solution has been destroyed.
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