Question

what change of kinetic energy of a body will be observed when its mass is doubled?

Answer 1

Answer:

$kinetic \: energy \: = \frac{1}{2} {mv}^{2} \\ if \: mass = 2m \\ kinetic \: energy = \frac{1}{2} \times {2mv}^{2} \\ = m {v}^{2} \\ therfore \: when \: mass \: is \: doubled \: kinetic \: energy \: becomes \: 2 \: times \: more$