Physics

Problem

0.40\,\text{kg}

ball moving at

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

strikes a stationary ball on a smooth surface. The coefficient of restitution for the pair is

0.5

. Immediately after the impact the first ball comes to rest. The mass of the second ball is closest to: a)

0.60\;\text{kg}

0.80\;\text{kg}

1.20\;\text{kg}

0.40\;\text{kg}