A 60.0kg skier traveling at 20.0m/s reaches the foot of a steady upward 20.0 degree incline and glides 35.0m along this slope before coming to rest. Calculate the coefficient of friction along this slope. and... Power to a cooling fan is turned off when it is turning at 720rpm. The fan makes 1350 revolutions before it comes to rest. Calculate the fan's average angular acceleration and the time it took to come to rest.