1. The problem statement, all variables and given/known data The two blocks (m = 14 kg and M = 100 kg) in Fig. 6-39 are not attached to each other. The coefficient of static friction between the blocks is μs = 0.28, but the surface beneath the larger block is frictionless. What is the minimum magnitude of the horizontal force required to keep the smaller block from slipping down the larger block? 2. Relevant equations no idea 3. The attempt at a solution Couldn't attempt anything because I don't know where to began and the horrible Haliday text doesn't help me.