Physics Lab
Physics Lab
IntroductionLessonsStudy
Guide
Example
Problems
Practice
Problems
AP®-Style
Questions
Other
Resources
Help
  Complete and Continue  

Rotational Motion

Introduction

In a previous lesson we learned bout circular motion, where an object travels around a circular path.

Now let's learn about rotational motion. This means we're going to describe how an object rotates or spins around its own center (not how it translates through 2D space). It's possible for an object to be rotating and translating at the same time, but we're going to study those motions separately.

Look around and you'll probably find examples of rotational motion: a ceiling fan or desk fan, a clock (the old fashioned kind), a washer or dryer, a door as it opens and closes, wheels on a bike or a car passing by, or even the Earth rotating once a day.

In this lesson we'll learn how to use the angular description of motion. That means we're going to describe rotational motion using, you guessed it, angles! We'll cover angular position, angular displacement, angular velocity and angular acceleration. Although these might seem pretty different than their linear counterparts, we can actually use the same kinematic equations from 1D motion but use angular variables instead.

In the next lesson we'll bring together circular and rotational motion and learn how to convert between the tangential and angular descriptions of motion.

This lesson covers the kinematics of rotational motion. We'll learn about torque and rotational dynamics later.

Lessons
Study Guide

Download:Rotational Motion - Study Guide.pdf
Example Problems
Practice Problems

Download:Rotational Motion - Practice Problems.pdf
Angular Position and Displacement
Rotational motion practice problem 1
Show answer
Rotational motion practice problem answer 1Rotational motion practice problem 2
Show answer
Rotational motion practice problem answer 2Rotational motion practice problem 3
Show answer
Rotational motion practice problem answer 3
AP®-Style Questions

Multiple-Choice Questions

Other Resources
Help
Complete and Continue