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Asked Dec 10, 2019
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A 74-kg base runner begins his slide into second base when he is moving at a speed of 3.1 m/s. The coefficient of friction between his clothes and Earth is 0.70. He slides so that his speed is zero just as he reaches the base.

(a) How much mechanical energy is lost due to friction acting on the runner?
 

(b) How far does he slide?
 
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Expert Answer

Step 1

The mechanical energy lost...

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Change in Energy = Work done W = -m(v} - v? ) =(74kg)[0-(3.1m/s)"] [", =0] =-355.57J The lost energy due to friction is 355.57 J.

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