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
physics - Physics, Wednesday, October 30, 2013 at 4:11pm
Both of the answers above are wrong answer is 24°