A ball with mass $0.16\,\text{kg}$ is travelling forwards at a speed of $0.50\,\text{m s}^{-1}$. A second ball has mass $0.10\,\text{kg}$ and is at rest. The first ball collides with the second ball. After the collision, the second ball travels forwards at a speed of $0.50\,\text{m s}^{-1}$. What is the speed of the first ball after the collision?
- A$0.0\,\text{m s}^{-1}$
- B$0.19\,\text{m s}^{-1}$
- C$0.31\,\text{m s}^{-1}$
- D$0.50\,\text{m s}^{-1}$