Teacher resources and professional development across the curriculum

Teacher professional development and classroom resources across the curriculum

Monthly Update sign up
Mailing List signup
Science in Focus: EnergySupport MaterialsChannel-TalkEnergy
About the Workshop
Broadcast Schedule
Graduate Credit
HomeSite Map
Energy Explanations
Energy Resources
Energy Discoveries
Tracing the Path
Individual Workshops
Workshop 1
Workshop 2
Workshop 3
Workshop 4
Workshop 5
Workshop 6
Workshop 7
Workshop 8

Workshop 4. Energy in Cycles

Energy can be seen in cycles every day, from the bouncing of balls to the swinging of pendulums. In this session, further explore the relationship between kinetic and potential energy to understand how cycles begin and are sustained, and why they decay.

This video is currently not available.

Program Questions


1. What happens to energy when an object swings, bounces or oscillates?

In each cycle, potential energy is converted to kinetic energy and back again.

2. What are some everyday examples of energy cycles?

Examples of energy cycles include pendulums, bouncing balls springs, vibrating strings, and people running and walking.

3. Why do most energy cycles diminish over time?

In each cycle, some of the energy leaves the system as heat, sound, or other forms of energy.

4. How can we add energy to maintain a cycle?

Energy impulses have to be timed — and forces applied in the right direction — so that they add to the total energy in the cycle in stead of reducing it.


WWWFurther Explanations


1. Energy Cycles


2. Walking as an Energy Cycle


3. Why Does the Ball Stop Bouncing?

Toy Car

4. Clocks Rely on Cycles


© Annenberg Foundation 2017. All rights reserved. Legal Policy