## College Physics (4th Edition)

$K = \frac{p^2}{2m}$
We can use the momentum to find an expression for $v$: $p = mv$ $v = \frac{p}{m}$ We can find an expression for the kinetic energy: $K = \frac{1}{2}mv^2$ $K = \frac{1}{2}(m)(\frac{p}{m})^2$ $K = \frac{p^2}{2m}$