Conservation of Angular Momentum · PhysicsBowl 2017 #24
Physics · mechanics
Problem
What condition must be met for the angular momentum of a system to be constant?
(A) The mechanical energy is constant.
(B) There is no net external force acting on the system.
(C) The system is in static equilibrium.
(D) There is no net external torque acting on the system.
(E) Only the gravitational force is acting on the system.