Question: A 50 kg cart is moving across a friction-less floor at 2 m/s. A 70 kg boy, riding the cart, jumps off so that he hits the floor with zero velocity.
1. What impulse did the boy give to the cart?
2. What was the velocity of the cart after the boy jumped?
Momentum = mass * velocity
Impulse = force * time = change in momentum = mass * (Vfinal - Vinitial)
Initial momentum of the car ...
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