The man having a weight of W1 pushes horizontally on the bottom of crate A, which is stacked on top of crate B. Each crate has a weight W2. If the coefficient of static friction between each crate is μs and between the bottom crate, his shoes, and the floor is μs, determine if he can cause impending motion.

Given:

W1 = 150 lb

W2 = 100 lb

a = 2 ft

b = 3 ft

μ s = 0.8

μs = 0.3

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B