With reference to perfectly elastic collisions between two bodies, which statement is correct?
- ANeither total momentum nor total kinetic energy need be conserved but total energy must be conserved.
- BTotal momentum and total energy are conserved but total kinetic energy may be changed into some other form of energy.
- CTotal kinetic energy and total energy are both conserved but total momentum is conserved only if the two bodies have equal masses.
- DTotal momentum, total kinetic energy and total energy are all conserved.