Question

In the elastic collision of objects
A. Only momentum remains constant
B. Only kinetic Energy remains constant
C. both remains constant
D. none of these

Answer 1

Hint: In order to solve this question, we should know that in physics collision means when two bodies come in contact with each other and there is a change in momentum of both bodies and also there is the transfer of kinetic energy from one body to another and in between this some quantities remains conserved or there is loss here we will discuss about the elastic collision of objects.

Complete step by step solution:
There are mainly three kinds of collision in physics namely elastic collision, inelastic collision, and perfectly inelastic collision. Elastic collisions are those when two objects collide with each other, the net momentum of the system remains constant which means the initial momentum of the system before the collision is equal to the final momentum of the system after the collision and also in the elastic collision the kinetic energy of the system remains constant which means initial kinetic energy of the system before the collision is equals to the final kinetic energy of the system. So, Kinetic energy and momentum in elastic collision remains constant.

Hence, the correct answer is option C.

Note: It should be remembered that, in inelastic collision, momentum remains constant but final kinetic energy is always less than the initial kinetic energy because of some of the energy loss in other forms such as heat and sound energy.