A 90 kg man is standing still on frictionless ice. His friend tosses him a 10 kg ball, which has a horizontal velocity of 20 m/s. After catching the ball, what is the man's velocity?
Using Law of Conservation of momentum.
Initial momentum is equal to final momentum
Initial momentum =
After the man catches the ball both ball and man move with the same velocity. Therefore
Final Momentum =
Equating the two