A 67.9kg skier coasts up a snow-covered hill that makes an angle of 27.7o with the horizontal. The initial speed of the skier is 8.54m/s. After coasting a distance of 1.94m up the slope, the speed of the skier is 3.15m/s. Calculate the work done by the kinetic frictional force that acts on the skis. This is a problem that I seem to keep getting wrong. I have spent over an hour on it now.... so far I have come up with that i will find my initial and final KE by .5mv^2 How do I incorporate the conservational equation into this? My mind is jumbled Thanks.