GlenCalc

Kinetic energy calculator

Kinetic energy grows with the square of speed: twice as fast carries four times the energy.

Your answer

Kinetic energy100 J
In foot-pounds73.76 ft·lbf

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How we worked it out

Updated as you change the numbers.

  1. KE = ½ × m × v²; v = √(2KE ÷ m); m = 2KE ÷ v².

Method and assumptions

Classical kinetic energy, accurate well below the speed of light.

Questions

What is the kinetic energy of 2 kg at 10 m/s?

100 J.

Sources

Method and figures checked on . Every worked answer on this page is covered by an automated test. Found a mistake? Tell us.

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