A person gives a box a shove so that it slides up a ramp, then reverses its

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A person gives a box a shove so that it slides up a ramp, then reverses its motion and slides down. The direction of the force of friction is 

A. Always down the ramp. 

B. Up the ramp and then down the ramp. 

C. Always down the ramp. 

D. Down the ramp and then up the ramp.

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Related Book For  answer-question

College Physics A Strategic Approach

ISBN: 9780321595492

2nd Edition

Authors: Randall D. Knight, Brian Jones, Stuart Field

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