Question

1)A toy car of mass 1 kg moves westwards with a speed of 2 m，s-1。It collides head-on with a toy train，The train has a mass of 1.5 kg and is moving at a speed of 1,5 m's-1 eastwards。If the car rebounds at 2.05 m-s-1，calculate the final velocity of the train。

2)Consider the collision of two cars。Car 1 is at rest and Car 2 is moving at a speed of 2 m·s-1 to the left。Both cars each have a mass of 500 kg。The cars collide and stick together。What is the resulting velocity of the cars？