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Jm4872
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Homework Statement
A skier of mass 78.7 kg is pulled by a motor-driven cable up a 31.9 ° slope at a constant speed of 1.04 m/s. If the coefficient of kinetic friction between the skis and the slope is 0.270, what power must be delivered by the motor pulling the cable?
Homework Equations
P=FV
The Attempt at a Solution
The Fnet of the skier will be 0 because the velocity is constant.
To find the F|| of the skier I used the equation mgsin(x) and umg to find Force friction(Ff)
Therefore, T=F||-Ff
and therefore P=T*v
but everytime I do this I get the wrong answer, and I don't know why??Please help!
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