Kinetic Energy

Also known as KE = ½mv² · half m v squared

E_k = \tfrac{1}{2} m v^{2}

Eₖ =

m =

v =

Enter your known values, leave one input blank, and solves for the missing one. Try different units for next level excitement!

Learning zone

Energy scales with the square of speed: doubling a vehicle's speed quadruples its kinetic energy — and roughly quadruples its braking distance. That square term is why highway crashes are so much more destructive than city ones.

Kinetic Energy

E_k = \tfrac{1}{2} m v^{2}

Where

$E_k$ = Kinetic energy
$m$ = Mass
$v$ = Speed

Missing one of these? Work it out first, then come back

Kinetic energy — Rotational Kinetic Energy, Photoelectric Effect
Mass — Newton's Second Law, Density
Speed — Speed, Distance & Time, Centripetal Acceleration (a = v²/r)

Part of this formula set

Work, energy and power

8 formulasWork, the two stores of mechanical energy, the theorem that connects them to speed, and the two ways of writing power.