일반물리학 1 — Force and Motion-II: Problem 35

35 The two blocks (m = 16 kg and M = 88 kg) in Fig. 6-40 are not attached to each other. The coefficient of static friction between the blocks is $\mu_s = 0.33$, but the surface beneath the larger block is frictionless. What is the minimum magnitude of the horizontal force $\vec{F}$ required to keep the smaller block from slipping down the larger block?