# Physics Lesson 7.2.7 - Kinetic Energy in Rotational Motion

Welcome to our Physics lesson on Kinetic Energy in Rotational Motion, this is the seventh lesson of our suite of physics lessons covering the topic of Dynamics of Rotational Motion, you can find links to the other lessons within this tutorial and access additional physics learning resources below this lesson.

## Kinetic Energy in Rotational Motion

Again, we use the similarity between translational and rotational motion to deduce the formula of rotational kinetic energy KErot. Thus, given that kinetic energy of translational motion is

KE = m × v2/2

where m is the mass of the moving object and v is its velocity, and since moment of inertia is analogue to mass and angular velocity is analogue to linear velocity, we obtain for kinetic energy of rotational motion:

KErot = I × ω2/2

You have reached the end of Physics lesson 7.2.7 Kinetic Energy in Rotational Motion. There are 8 lessons in this physics tutorial covering Dynamics of Rotational Motion, you can access all the lessons from this tutorial below.

## More Dynamics of Rotational Motion Lessons and Learning Resources

Rotation Learning Material
Tutorial IDPhysics Tutorial TitleTutorialVideo
Tutorial
Revision
Notes
Revision
Questions
7.2Dynamics of Rotational Motion
Lesson IDPhysics Lesson TitleLessonVideo
Lesson
7.2.1Moment of Force as Analogue of Force in Translational World
7.2.2Moment of Inertia
7.2.3Moment of Inertia in Different Systems of Rotational Motion
7.2.4Newton's Second Law for Rotational Motion
7.2.5Angular Momentum
7.2.6Work in Rotational Motion
7.2.7Kinetic Energy in Rotational Motion
7.2.8Power in Rotational Motion

## Whats next?

Enjoy the "Kinetic Energy in Rotational Motion" physics lesson? People who liked the "Dynamics of Rotational Motion lesson found the following resources useful:

1. Kinetic Energy Feedback. Helps other - Leave a rating for this kinetic energy (see below)
2. Rotation Physics tutorial: Dynamics of Rotational Motion. Read the Dynamics of Rotational Motion physics tutorial and build your physics knowledge of Rotation
3. Rotation Revision Notes: Dynamics of Rotational Motion. Print the notes so you can revise the key points covered in the physics tutorial for Dynamics of Rotational Motion
4. Rotation Practice Questions: Dynamics of Rotational Motion. Test and improve your knowledge of Dynamics of Rotational Motion with example questins and answers
5. Check your calculations for Rotation questions with our excellent Rotation calculators which contain full equations and calculations clearly displayed line by line. See the Rotation Calculators by iCalculator™ below.
6. Continuing learning rotation - read our next physics tutorial: Centripetal Force