Rotational Motion & Torque

Why is it easier to open a door from the handle than the hinge? This section translates the laws of linear motion into the world of rotation, covering angular kinematics, moment of inertia, and the turning forces known as torque.

🚧 Rotational motion content is currently in development. Full lessons, skills, and problems will roll out during the 2026–2027 school year.
A close-up of a car wheel spinning quickly while driving down a road.
Rotational motion is when an object spins around a center point, like this car wheel. To make the wheel start spinning or stop, a twisting force called torque is used.

Core Concepts

Understand angular variables, rotational kinetic energy, and how torque causes angular acceleration. Click on a concept to explore the mechanics of rotation.

Essential Skills

Master the conversion between linear and angular quantities, calculate net torque, and apply the principles of angular momentum conservation to spinning systems.

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Practice Problems

Challenge yourself with problems involving rolling motion, pulley systems with mass, and the equilibrium of rigid bodies.

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