Homework Help: physics

Posted by Samantha on Friday, October 22, 2010 at 1:54am.

A 15kg box is resting on a hill forming an angle of a horizontal surface. The coefficient of static friction for the box on the surface is 0.45. Calculate the maximum angle of the incline just before the box starts to move.

physics - drwls, Friday, October 22, 2010 at 7:29am
Let A be the angle.

Friction force = Weight component down incline

M g * cos A * 0.45 = M g sinA

solve for A.
Mg cancels out. (Use arctangent function)
physics - Michael, Thursday, January 10, 2013 at 11:38pm
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