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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 snail crawling across a leaf
wind blowing
stored energy
an apple falling from a tree to the ground
while the baseball is rising
Energy can be converted from one form into another, but it cannot be created or destroyed.
a windup spring making a toy car move across the floor
a cheetah that is running
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 snail crawling across a leaf
wind blowing
stored energy
an apple falling from a tree to the ground
while the baseball is rising
Energy can be converted from one form into another, but it cannot be created or destroyed.
a windup spring making a toy car move across the floor
a cheetah that is running
Which of these is an example of kinetic energy?
a snail crawling across a leaf
wind blowing
stored energy
an apple falling from a tree to the ground
while the baseball is rising
Energy can be converted from one form into another, but it cannot be created or destroyed.
a windup spring making a toy car move across the floor
a cheetah that is running
Which of these is an example of the conversion of elastic potential energy into kinetic energy?
a snail crawling across a leaf
wind blowing
stored energy
an apple falling from a tree to the ground
while the baseball is rising
Energy can be converted from one form into another, but it cannot be created or destroyed.
a windup spring making a toy car move across the floor
a cheetah that is running
Which of these is an example of the conversion of gravitational potential energy into kinetic energy?
a snail crawling across a leaf
wind blowing
stored energy
an apple falling from a tree to the ground
while the baseball is rising
Energy can be converted from one form into another, but it cannot be created or destroyed.
a windup spring making a toy car move across the floor
a cheetah that is running
Which of the following examples of a cheetah has the most kinetic energy?
a snail crawling across a leaf
wind blowing
stored energy
an apple falling from a tree to the ground
while the baseball is rising
Energy can be converted from one form into another, but it cannot be created or destroyed.
a windup spring making a toy car move across the floor
a cheetah that is running
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 snail crawling across a leaf
wind blowing
stored energy
an apple falling from a tree to the ground
while the baseball is rising
Energy can be converted from one form into another, but it cannot be created or destroyed.
a windup spring making a toy car move across the floor
a cheetah that is running
Which term describes potential energy?
a snail crawling across a leaf
wind blowing
stored energy
an apple falling from a tree to the ground
while the baseball is rising
Energy can be converted from one form into another, but it cannot be created or destroyed.
a windup spring making a toy car move across the floor
a cheetah that is running
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