Practice Questions -About Energy
1. Classify each of the following sentences as either examples of kinetic energy or potential energy.

a) A car is driving on a level road.
b) An elastic band is stretched to twice its normal length.
c) A book is on the top shelf of a bookcase.
d) A lightning bolt produces thunder that travels at 1250 km / h.

2. While doing work to lift an object, what form of energy does the object gain?

3. When frictional forces do work on an object, what form of energy is always produced?

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