Part I. Shorter problems focused on the fundamentals
Two blocks are in contact as shown with, $W_1 = 201$ lb, $W_2 = 239$ lb, and the angle, $\theta = 31^\circ$ and the
coefficients of friction are $\mu_1 = 0.16$, $\mu_2 = 0.29$.
a. What is the normal force between the blocks?
b. What force, P, is necessary to push the lower block to the left?