The definition of joules, th unit of energy is the 1 J = 1 kg * m2/v2. And that 1 joules is the amount of energy needed for the work done by one newton traveling one meter. From all this, I got the impression that to get energy, you would have to multiply force times distance. Is work, then just a measurement of energy. Assuming my first assumption that energy = F x D, lets sat a 5kg object is accelerating towards earth from 20 feet above at 9.8 m/s2 . To get the force, you would have to do 5 kg x 9m/s2 Then to get energy, that force times distance. So if it traveled 5 meters. The kinetic energy should be F(5kg x 9.8 m/s2) x D(5 meters.) Which would end up being 5kg x 49m2/s2. Sooo, can someone explain why ke is 1/2 mv2 instead of just mv2.