Physics

Problem

2\,\text{kg}

ice puck slides on a frictionless horizontal surface. It is moving to the right (take this as

+x

) at

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

just before a collision, and

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

to the left immediately after the collision. Calculate the change in momentum of the puck.