---
title: "Rotational Dynamics — AP Physics C Mechanics Guide"
description: "Rotational dynamics is Newton's second law rewritten for spinning objects: torque equals moment of inertia times angular acceleration. Core to Unit 5 FRQs."
canonical: "https://fiveable.me/ap-physics-c-mechanics/key-terms/rotational-dynamics"
type: "key-term"
subject: "AP Physics C: Mechanics"
---

# Rotational Dynamics — AP Physics C Mechanics Guide

## Definition

Rotational dynamics refers to the study of the motion and behavior of objects that are rotating or in rotational motion. It involves understanding concepts such as torque, angular acceleration, and moment of inertia.

## Related Study Guides

- [5.3 Rotational Dynamics and Energy](/ap-physics-c-mechanics/unit-5/rotational-dynamics-energy/study-guide/jKvIFgvCeciBTXqYrxc3)

## Review

### Related Terms

- [Torque](/ap-physics-c-mechanics/key-terms/torque): Torque is the measure of how effectively a force can cause an object to rotate. It depends on both the magnitude and direction of the force applied.
- [Angular Acceleration](/ap-physics-c-mechanics/key-terms/angular-acceleration): Angular acceleration is the rate at which an object's angular velocity changes over time. It is analogous to linear acceleration in translational motion.
- [Moment of Inertia](/ap-physics-c-mechanics/key-terms/moment-of-inertia): Moment of inertia is a property that quantifies an object's resistance to changes in its rotational motion. It depends on both the mass distribution and shape of the object.