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coffeecake
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Homework Statement
What is the minimum work needed to push a 1770 kg car 346 m up a 16.2 deg incline?
Without friction, I got the the answer of 1670000 J.
What is the minimum work needed if the coefficient of friction is 0.25?
Homework Equations
The Attempt at a Solution
Ff=µFN
FN = 17346 cos 16.2
FN = 16657 N
Ff = .25 * 16657 = 4164.25 N
then, sin16.2 * 17346 = 4839 N
add them? subtract? or is it all completely wrong?
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