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Topic: Geometric vectors help
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Andy

Posts: 2
From: CA
Registered: 2/19/06
Geometric vectors help
Posted: Feb 19, 2006 11:29 PM
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Hi,
Im having a tough time with this problem that my teacher gave me to do. I was wondering if someone could help me solve it or get me on the right track.

A 10.2kg crate is on a ramp with an incline of 15 degress to the horizontal. In order to keep the crate from sliding down a rope is attached to the crate. The rope is applying a force of 10.3 N that acts 40 degrees to the ramp.
Determine the magnitude of the force of friction.
HAVE TO USE THIS FORMULA TO SOLVE THIS PROBLEM NO COMPONENTS OR PROJECTIONS!
sin(A-B)=sinAcosB-sinBcosA

thanks all help is appreciated



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