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Mass of the Pulleys and the Cord Problem

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At a given instant the 10-lb block A is moving downward with a speed of 6 ft/s. Determine its speed 2 seconds later. Block B has a weight of 4 lb, and the coefficient of kinetic friction between it and the horizontal plane is uk=0.2. Neglect the mass of the pulleys and the cord.

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The solution solves a problem involving a mass of the pulleys and the cord.

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