session.masteringphysics.com CH0 Problem 7.54 Resources « previous | 19 of 21 ne

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session.masteringphysics.com CH0 Problem 7.54 Resources « previous | 19 of 21 next » Problem 7.54 Part A A 66.5 kg skier is moving at 6.10 m/s on a frictionless, horizontal snow-covered plateau whern she encounters a rough patch 3.70 m long. The coefficient of kinetic friction between this patch and her skis is 0.330. Aft and returning to friction-free snow, she skis down an icy, frictionless hill 3.10 m high. How fast is the skier moving when she gets to the bottom of the hill? er crossing the rough patch m/s Submit My Answers Give Up Incorrect; Try Again; 5 attempts remaining Part B How much internal energy was generated in crossing the rough patch? Submit My Answers Give Up Continue

Explanation / Answer

Ei = F*x = mgµ*3.5 = 795.726 J

KEb = ½mV1² - 795.726 + mgh = 2461.78 = ½mVb²

Vb = (2*2190.77/m) = 8.6045 m/s

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