Question

give reason why a light and a heavy body can have equal amount of kinetic energy ??

Answer 1

kinetic energy depend upon mass nd velocity
for heavy body , v is less but m is more
for light body , v is more but m is less

Answer 2

Kinetic energy
$= \frac{1}{2} m {v}^{2}$

Now,if the heavy body has less velocity and lighter body has greater velocity then they can be equal.