Homework Help: physics

Posted by Me on Saturday, October 9, 2010 at 6:30pm.

A 60 kg skier with an initial speed of 12 m/s coasts up a 2.5 m high rise that makes a 35 degree angle with the horizontal. If the coefficient of friction between the skis and the snow is .08, find the speed of the skier when he reaches the top of the rise.

How much work does friction do on the skier?

This is a conservation of energy type of problem!

physics - bobpursley, Saturday, October 9, 2010 at 6:36pm
The work done on friction=mu*mgCos35*2.5/sin35

change of PE=mg*2.5

InitialKE=FinalKE-changePE-frictionwork
find the final speed.

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