Can angular momentum be conserved?

1 Answer
Mar 3, 2018

Angular momentum is conserved in a system if net torque on the system is 0.

Explanation:

d/dtvec L = vec tau where vec L is net angular momentum and vec tau is net torque

So if net torque = 0
we get,
vec tau = 0

=> d/dtvecL = 0
no change in net angular momentum, hence it is conserved.