It's the energy of a body in motion. It's very intuitive that speed and mass are both important parameters when calculating the energy of a moving body (it's every day experience that a 100 Km/h car and a 50 Km/h truck are both very dangerous bodies, from an impact point of view!!!). The kinetic energy can then be calculated with the formula:

where v is the speed and m
is the mass of the moving object. |