Question

The quantities remaining constant in a collision are
(a) momentum, kinetic energy and temperature
(b) momentum and kinetic energy but not temperature
(c) momentum and temperature but not kinetic energy
(d) momentum, but neither kinetic energy nor temperature.

Answer 1

(d) momentum, but neither kinetic energy nor temperature.

Explanation: 

Since velocities of the colliding bodies change, the K.E. will change. The shapes of the bodies at the time of collision change due to the force, hence temperature will also change. Only the momentum will remain constant.