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A 36-kg skier coasts up a snow-covered hill thats makes anangle of 25o with the horizontal. The initial speed ofthe skier is 6.6m/s. After coasting a distance of 1.9 m up theslope, the speed of the skier is 4.4 m/s.

(a) Find the work done bythe kinetic frictional force that acts on the skis.

(b) what is the magnitude of the kinetic frictional force?

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