A molecule with mass $m$ and speed $v$ collides with a wall while moving at right angles to the wall. The collision is elastic. What changes are produced in the molecule’s momentum and kinetic energy by 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 $0$