Question

A body of mass $60kg$ has the momentum $3000kgm{s}^{-1}$. Calculate the kinetic energy.

Answer 1

Given;
Mass of the body, $m=60kg$
Momentum, $p=3000{kgms}^{-1}$
Kinetic energy of a body of mass ${}^{\prime }{m}^{\prime }$ having a momentum ${}^{\prime }{p}^{\prime }$ is expressed as
$K.E.=\frac{p^2}{2m}$
$\therefore KE=\frac{{3000}^2}{2\times 60}=75000J$