- #1
lalahelp
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Homework Statement
A crate of potatoes of mass 13.0 kg is on a ramp with angle of incline 40° to the horizontal. The coefficients of friction are μs = 0.78 and μk = 0.43. Find the frictional force (magnitude) on the crate if the crate is at rest.
Homework Equations
F=ma
Ff=μmgcosα
The Attempt at a Solution
Ff=.78*13*9.81*cos40
=76.2 N
Why is my answer wrong?