Physics

Problem

Two bodies move along a smooth straight track. Body

A

has mass

2\,\text{kg}

and speed

6\,\text{m s}^{-1}

, while body

B

has mass

1\,\text{kg}

and is initially at rest. They collide head-on with a coefficient of restitution

e=0.50

. What is the speed of body

B

immediately after the collision? a)

5\,\text{m s}^{-1}

6\,\text{m s}^{-1}

4\,\text{m s}^{-1}

8\,\text{m s}^{-1}