A molecule with mass $m$ is moving at speed $v$ and strikes a wall at right angles to the wall. The collision is elastic. What changes occur in the molecule’s kinetic energy and momentum as a result of the collision?
- Achange in momentum $0$, change in kinetic energy $0$
- Bchange in momentum $0$, change in kinetic energy $mv^2$
- Cchange in momentum $2mv$, change in kinetic energy $0$
- Dchange in momentum $mv^2$, change in kinetic energy $0$