Question

You walk into an alley and on the roof of the buildings on either side is a nemesis. The nemesis on one side is throwing a bowling ball and the nemesis on the other side is throwing a ping pong ball. The balls are thrown with the same momentum. Neglect air resistance and gravitational acceleration and assume a perfectly plastic impact. Which ball do you need to dodge like your life depends on it? A. The ping pong ball. B. The bowling ball. C. It doesn't matter.

Answer 1

B. The bowling ball.

Note- although both ball has same momentum, mass of bowling ball is greater than ping pong ball. So in perfectly inelastic collision, change in momentum of you during collision is greater with bowling ball which imparts higher force during collision with you . That's why you wanna dodge it.