# physics

An Olympic skier moving at 20.0 m/s down a 30.0 degree slope encounters a region of wet snow and slides 145 m before coming to a halt. What is the coefficient of friction between the skis and the snow?

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1. Initial K.E. = work done against friction while slowing down
= M g cos 30*mu

= (M/2)*V^2

M cancels out. Solve for mu

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2. 0.74

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