Blocks A, B, and C have weights of 50 lb, 25 lb, and 15 lb, respectively. Determine
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Blocks A, B, and C have weights of 50 lb, 25 lb, and 15 lb, respectively. Determine the smallest horizontal force P that will cause impending motion. The coefficient of static friction between A and B is ?s = 0.3, between B and C, ??s = 0.4, and between block C and the ground ???s = 0.35,
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A B C D P
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