If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

Main content
Review how angular momentum is conserved if there is no external torque applied to a system.  Specific scenarios are highlighted: system changing it rotational inertia, orbiting bodies, and rotational collisions.
Sort by: