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
Physics

Torque and angular momentum

Physics

Torque and angular momentum

Lessons

Rotational kinematics

Learn
Angular motion variables
(Opens a modal)
Relating angular and regular motion variables
(Opens a modal)
Relationship between angular velocity and speed
(Opens a modal)
Rotational kinematic formulas
(Opens a modal)

Torque, moments, and angular momentum

Learn
Introduction to torque
(Opens a modal)
Moments
(Opens a modal)
Moments (part 2)
(Opens a modal)
Finding torque for angled forces
(Opens a modal)
Torque
(Opens a modal)
Rotational version of Newton's second law
(Opens a modal)
More on moment of inertia
(Opens a modal)
Rotational inertia
(Opens a modal)
Rotational kinetic energy
(Opens a modal)
Rolling without slipping problems
(Opens a modal)
Angular momentum
(Opens a modal)
Constant angular momentum when no net torque
(Opens a modal)
Angular momentum of an extended object
(Opens a modal)
Ball hits rod angular momentum example
(Opens a modal)
Cross product and torque
(Opens a modal)

About this unit

Everything you've learned about motion, forces, energy, and momentum can be reused to analyze rotating objects. There are some differences, though. Here, you'll learn about rotational motion, moments, torque, and angular momentum.