At a given instant block A of weight W_A is moving downward with speed v_A0. Determine its speed at a later time t. Block B has a weight W_B and the coefficient of kinetic friction between it and the horizontal plane is μ_k. Neglect the mass of the pulleys and cord. Given:

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WA = 10 lb VAO = 6- S t = 2 s ft WB = 4 lb Mk = 0.2 g = 32.2 ft 2 S