Homework Help: PHYSICS

Posted by Anonymous on Thursday, February 16, 2012 at 4:37pm.

A crate of potatoes of mass 9.0 kg is on a ramp with angle of incline 30° to the horizontal. The coefficients of friction are μs = 0.69 and μk = 0.41. Find the frictional force (magnitude and direction) on the crate if the crate is at rest.
magnitude N?

thanks

PHYSICS - bobpursley, Thursday, February 16, 2012 at 5:05pm
friction up the plane: mg*mu*cosTheta
PHYSICS - Michelle, Thursday, February 16, 2012 at 5:11pm
DO i use uk or us for u cuz i used both n it was wrong

I put 9(9.8)x9(.69)(.41)cos(30) :/
PHYSICS - Anonymous, Thursday, February 16, 2012 at 6:47pm
please help me i am stuck

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