Final: Conservation of Energy Flashcards

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1
Q

At the top of its arc, a thrown ball has _____ potential energy

A

maximum

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2
Q

as a dropped penny falls toward the ground, _______ energy is converted to _____ energy

A

potential, kinetic

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3
Q

a dropped racquetball will not return to its original position because

A

some of the mechanical energy is converted to nonmechanical energy

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4
Q

the law of conservation of energy states that energy

A

cannot be created or destroyed

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5
Q

mechanical energy can change to nonmechanical energy as a result of

A

air resistance and friction

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6
Q

a system that receives energy from external sources is called

A

open

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7
Q

______ is the ratio of useful work output to work input

A

efficiency

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