A 64.0-kg skier starts from rest at the top of a ski slope of height 64.0...
A 64.0-kg skier starts from rest at the top of a ski slope of height 64.0 m .
a) If frictional forces do −1.01×104 J of work on her as she descends, how fast is she going at the bottom of the slope?
Take free fall acceleration to be g = 9.80 m/s2
b) Now moving horizontally, the skier crosses a patch of soft snow, where the coefficient of friction is 0.25. If the patch is of width 62.0 m and the average force of air resistance on the skier is 160 N , how fast is she going after crossing the patch?
c) After crossing the patch of soft snow, the skier hits a snowdrift and penetrates a distance 2.2 m into it before coming to a stop. What is the average force exerted on her by the snowdrift as it stops her?
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