February 19, 2017

Homework Help: physics

Posted by Kim on Wednesday, November 30, 2011 at 8:26pm.

A 69.4-kg skier coasts up a snow-covered hill that makes an angle of 24.3° with the horizontal. The initial speed of the skier is 7.04 m/s. After coasting 1.78 m up the slope, the skier has a speed of 3.04 m/s. Calculate the work done by the kinetic frictional force that acts on the skis.

I've done this question 3 different times, CAPA doesn't accept my answer.

I've used Energy lost as friction = KElost - PEgained, getting 900 J. But this isn't right. I don't know what else to do.

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