Physics

Problem

Cart P (

0.40\,\text{kg}

) moves at

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

to the right and collides elastically, head-on, with cart Q (

0.80\,\text{kg}

) moving

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

to the left. Determine the speed and direction of each cart immediately after the collision. Use rightward as the positive direction.