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Basic Physics
Rotation
Conservation of angular momentum

8. Rotation

Conservation of angular momentum

Formula

\vec L_i=\vec L_f

For a body whose moment of inertia changes

I_i\omega_i=I_f\omega_f

Tags

physics
physics formula
momentum
rotation

Detail

The initial angular momentum equals the final angular momentum.

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Conditions

zero net external torque.

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Related formulas

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Angular momentum of a rigid body
$L=I\omega$
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Torque and angular momentum
$\sum\vec\tau_{\text{ext}} = \frac{d\vec L}{dt}$
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