A 50.0-kg block is being pulled up a 13.0° slope by a force of 250 N which is parallel to the slope, but the block does not slide up the slope. What is the minimum value of the coefficient of static friction required for this to happen?
A) 0.115
B) 0.566
C) 0.654
D) 0.359
E) 0.292

Question

Quizplus · Accepted Answer

The force of static friction must be equal to the component of gravitational force pulling the block down the slope minus the applied force. The normal force is the component of gravitational force perpendicular to the slope. Using these, the minimum coefficient of static friction can be calculated as 0.292.

A 500-Kg Block Is Being Pulled Up a 13