The 75-kg boy leaps off cart A with a horizontal velocity of v' = 3 m/s measured rel...

The 75-kg boy leaps off cart A with a horizontal velocity of v' = 3 m/s measured relative to the cart. Determine the velocity of cart A just after the jump. If he then lands on cart B with the same velocity that he left cart A, determine the velocity of cart B just after he lands on it. Carts A and B have the same mass of 50 kg and are originally at rest.