please answer A and B A 62.0-kg skier is moving at 6.50 m/s on a frictionless, h
ID: 1535228 • Letter: P
Question
please answer A and B A 62.0-kg skier is moving at 6.50 m/s on a frictionless, horizontal, snow-covered plateau when she encounters a rough patch 4.50 m long. The coefficient of kinetic friction between this patch and her skis is 0.300. After crossing the rough patch and returning to friction-free snow, she skis down an icy, frictionless hill 2.50 m high. Part A How fast is the skier moving when she gets to the bottom of the hill? Express your answer with the appropriate units. v_2 = ___________ ______________ Part B How much internal energy was generated in crossing the rough patch? Express your answer with the appropriate units. E = ___________ _______________Explanation / Answer
Ei = F*x = mgµ*4.5 = 821.1 J
KEb = ½mV1² - 821.1 + mgh = 2009.2= ½mVb²
Vb = (2*2009.2/m) = 8.051 m/s
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