The basic formula was correctly posted, the very equation which Einstein took to its ultimate conclusion; as typed out in my previous post, 'mv' is mass multiplied by velocity. Kinetic energy is converted into potential energy whenever the velocity or direction of the mass is changed.
Put another way: Smack a duck into an airplane windshield by hand and you'll shatter the duck. SLAM the duck into the same windshield at a few hundred miles an hour and you'll shatter BOTH.
Multiply mass by velocity, then square the result.
If you multiply the mass by the speed of light and square the result, you get a mushroom...cloud.
Nuke 'em, Rico. And, uh, watch out for PETA.