Single correct option
In an elastic collision between two bodies, which of the following quantities is conserved?
- A. Both momentum and kinetic energy
- B. Momentum only
- C. Kinetic energy only
- D. Neither momentum nor kinetic energy
Show answer and solution
Answer: (A) Both momentum and kinetic energy
Momentum is conserved in every collision when no external force acts. Kinetic energy is conserved only in an elastic collision. In an inelastic collision part of the kinetic energy changes to heat, sound or deformation, so 'momentum only' describes the inelastic case.
Saved on this device. Sign in or create a free account to keep it on every device.