**Credit**: Charles Hutchins

**Source**: http://www.flickr.com/photos/celesteh/3266906452/

**License**: CC BY-NC 3.0

We have looked at circular motion using the same measures as linear motion. To look at rotation in more detail, though, we need to work in rotational units - measuring the angle rotated through, the angular sped, and angular acceleration.

## Chapter Outline

- 8.1. Angular Momentum
- 8.2. Torque
- 8.3. Two Conditions of Equilibrium
- 8.4. Applications of Equilibrium Conditions

### Chapter Summary

- Angular momentum is defined as the product of rotational inertia and angular velocity.
- Torque is defined as , where the angle is the angle between the lever arm and force . The symbol for torque is the Greek letter tau
- By definition a counterclockwise torque is positive and a clockwise torque is negative.
- Two conditions of equilibrium:
- Translational equilibrium:
- Rotational equilibrium:

### Image Attributions

**[1]****^**Credit: Charles Hutchins; Source: http://www.flickr.com/photos/celesteh/3266906452/; License: CC BY-NC 3.0

## Description

Covers angular momentum and torque along with translational and rotational equilibrium.

## Difficulty Level:

At Grade## Authors:

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## Date Created:

Jun 10, 2014## Last Modified:

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