A 3 kg ball is dropped from a height h and swings towards a stationary ball of 2 kg with a velocity of 1.18 m/s. The balls collide and one swings in the other direction with a velocity of 1.77 m/s. Is momentum conserved? Show all work.
A 3000 kg truck traveling at 14 m/s strikes a stationary 1000 kg car and the two lock together. Find the final velocity of the two vehicles.