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# Kinetic energy

In physics, kinetic energy is energy possessed by a body by virtue of its motion. If the body with mass m is moving in a straight line with velocity v, its translational kinetic energy amounts to

$E_k = \frac{1}{2} m v^2$.

If a body is rotating, its rotational kinetic energy equals Iω2/2, where I is its moment of inertia and ω its angular velocity.