Enter any two of mass m, speed v, and energy E (use consistent units), then click calculate to get the third.
Kinetic energy is the energy of motion. In classical mechanics, the standard formula is E_k = 1/2 · m · v².
Kinetic energy grows with the square of speed, so doubling speed results in four times the energy.
In SI units, mass is in kilograms, speed in meters per second, and kinetic energy in joules.
Work and kinetic energy are linked: the work done on an object changes its kinetic energy.
The classical formula is accurate at speeds far below the speed of light; high-speed particles require relativistic treatment.
This page provides quick calculations and helps explain safety, energy use, and engineering estimates.
E_k = 1/2 · m · v².
Joule (J).
It becomes four times larger.
Mass and speed.
v = √(2E/m).
m = 2E / v².
Because it scales with v².
Work changes kinetic energy.
When speed is much less than the speed of light.
Safety analysis, mechanical design, and energy estimates.
Fast conversion between mass, speed, and kinetic energy for study and estimates.
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