The time derivative of this quantity is equal to torque, and this quantity is equal to a body's moment of inertia times angular velocity.
The Wigner-Eckart theorem describes operators based on eigenstates of this quantity, and the Laplace-Runge-Lenz vector is calculated as the cross product of linear momentum and this quantity. Kepler's second law is derived from the fact that this quantity is conserved, which can be derived from the principle of rotational invariance. The time derivative of this quantity is equal to torque, and this quantity is equal to a body's moment of inertia times angular velocity. For 10 points, name this quantity symbolized "L," the rotational analog of linear momentum.
The Wigner-Eckart theorem describes operators based on eigenstates of this quantity, and the Laplace-Runge-Lenz vector is calculated as the cross product of linear momentum and this quantity.
Angular Momentum [accept "L" until mention; do not accept or prompt on "Momentum"]