Question

For elastic collision between two spherical rigid bodies:

(a) total kinetic energy remains conserved

(b) total mechanical energy does not remain conserved

(c) linear momentum does not remain conserved

(d) linear momentum remains conserved.

Answer 1

Correct option is : (d) linear momentum remains conserved.

In non-elastic collision, after collision, the bodies do not regain their original shape and size. Therefore some of mechanical energy is not conserved. However, in absence of external force, the momentum remains conserved.

Hence, option (d) is correct.