Angular momentum (AQA A-Level Physics): Flashcards

Measure of rotational motion

$L = I\omega$

$\text{kg m}^2 \text{s}^{-1}$ or N m s

Vector

Perpendicular to rotation plane, along axis

L constant when no external torque acts

$I_1\omega_1 = I_2\omega_2$

Spins faster (I↓, ω↑, L conserved)

Maintains axis orientation when spinning rapidly

$\Delta L = T\Delta t$