Kinetic Energy Calculator
Find the kinetic energy of a moving object.
Kinetic energy is the energy an object has because it is moving.
The math behind it
KE = ½ × mass × velocity². Note velocity is squared, so doubling speed quadruples the energy.
Worked example
1,000 kg car at 20 m/s → ½ × 1000 × 400 = 200,000 J (200 kJ).
FAQ
Why does speed matter so much in crashes?
Because energy scales with the square of speed — small speed increases mean much more impact energy.