Two men A and B, each having a weight of 160lb, stand on the 200lb cart with wheels. Each man runs with a speed of 3 ft/s measured relative to the cart. Determine the final speed of the cart if a.) A runs and jumps off, then B runs and jumps off the same end, and b.) both run at the same time and jump off at the same time. Neglect mass of the wheels and assume jumps are in the horizontal direction.

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wt. of A wa = wt. of B wb = 160 lb
wt. of cart wc = 200 lb

a.) Let us assume, when A jumps off, the velocity of B+cart becomes v',
By law of ...

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