Suppose you set your textbook sliding across a gymnasium floor with a certain initial speed.

Suppose you set your textbook sliding across a gymnasium floor with a certain initial speed.

Suppose you set your textbook sliding across a gymnasium floor with a certain initial speed. It quickly stops moving because of a friction force exerted on it by the floor. Next, you start a basketball rolling with the same initial speed. It keeps rolling from one end of the gym to the other. Why does the basketball roll so far? Does friction significantly affect its motion?

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