A 100-Kg Box Is Placed on a Ramp

Multiple Choice

A 100-kg box is placed on a ramp.As one end of the ramp is raised,the box begins to move downward just as the angle of inclination reaches 10°.What is the coefficient of static friction between box and ramp?

A) 0.27
B) 0.18
C) 5.67
D) 0.13
E) ​17.36