Physics

Problem

An air-track cart of mass

0.75\,\text{kg}

moves rightward at

1.8\,\text{m/s}

and collides elastically with an identical cart that is at rest. What is the speed of the first cart immediately after the collision? a)

1.8\,\text{m/s}

0.90\,\text{m/s}

0\,\text{m/s}

-1.8\,\text{m/s}