Question

a 2,8kg trolley is moving to the right with a speed of 0,45m.s^-1. A 1.9kg brick is dropped from rest and lands on the trolley. the trolley and bRick move together across the horizontal surface. Assume an isolated system. determine the change in momentum of the trolley

Answer 1

Momentum is conserved. No change. The speed of the trolley will change but not its momentum unless an outside force acts on it.