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Andy
Posts:
2
From:
CA
Registered:
2/19/06


Geometric vectors help
Posted:
Feb 19, 2006 11:29 PM


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(AB)=sinAcosBsinBcosA
thanks all help is appreciated



