Question

In an elastic collision

पर्याय

•  the initial kinetic energy is equal to the final kinetic energy 

•  the final kinetic energy is less than the initial kinetic energy

• the kinetic energy remains constant

•  the kinetic energy first increases then decreases.

Answer 1

the initial kinetic energy is equal to the final kinetic energy

As no energy is lost into heat in an elastic collision, the initial kinetic energy is equal to the final kinetic energy.