Q. In an elastic collision between two bodies. the physical quantity that is conserved is:

 1458  209 EAMCETEAMCET 1999 Report Error

Solution:

A collision is said to be elastic if the total kinetic energy before and after collision remain the same or KE is conserved. Thus, if two bodies of masses and moving with velocities and collide in absence of external force also elastically and and are the final velocities, then according to conservation of momentum Also, according to principle of conservation of KE Therefore, it is clear that both kinetic energy and momentum are conserved.