A block of weight is held stationary against a rough vertical wall by applying a…
PHYSICS · Multi-part · AP · Physics 1: Algebra-based · Force and Translational Dynamics · Force and Translational Dynamics
Problem
A block of weight W is held stationary against a rough vertical wall by applying a horizontal force P. The coefficient of static friction between the block and the wall is μs.
(i) Derive an expression for the minimum value of P required to keep the block at rest.
(ii) If W=20N and μs=0.4, calculate (a) the minimum horizontal force, and (b) the angle that the resultant reaction of the wall makes with the horizontal.