3. A 328 kg car moving at 19.1 m/s hits from behind a second car has a mass of 790 kg moving at 13.0 m/s in the same direction. If just after the collision the second car has a new speed of 15.1 m/s (a) what is the velocity of the first car after the collision? Before 19.1 m/s 13.0 m/s After 15.1 m/s ? (b) Provide a proof of whether or not the collision is elastic.

3. A 328 kg car moving at 19.1 m/s hits from behind a second car has a mass of 790 kg moving at 13.0 m/s in the same direction. If just after the collision the second car has a new speed of 15.1 m/s (a) what is the velocity of the first car after the collision? Before 19.1 m/s 13.0 m/s After 15.1 m/s ? (b) Provide a proof of whether or not the collision is elastic.