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 the key concepts, equations, and skills for friction, including how to find the direction and magnitude of the friction force.
Sort by:
AP® is a registered trademark of the College Board, which has not reviewed this resource.