Potential to Kinetic Energy Activities

 

Rubber Band

 

A simple way to demonstrate elastic energy is to stretch a rubber band and not let go, the stretch demonstrates potential energy. Let go of the rubber aiming it toward a wall and it is converted to kinetic energy.

The rubber band can also illustrate energy conversion. Place the band against your upper lip to measure its temperature. Stretch and release the band repeatedly. Test the temperature again. It should feel warmer. Why does it feel warmer and where do you think the heat energy came from?

 

 

Dropping Books

 

Have all the students grab a reading or math book and stand up. Have them raise the books to an even level, about to their chin. Explain how they are using their energy to lift up the book, thus transforming it to potential (gravitational energy).

At the count of three have all the students release the books. There should be one loud THUD!

Ask the students what type of energies where released. Explain to the students that when you let go of the book the potential energy changed to kinetic energy. In addition the energy of sound was released when it hit the ground.

 

 

pull back car

 

Pull-back Car

 

A great example of potential and kinetic energy is a kid's pull-back toy car. Simply pull the car back on the ground, stop and hold. Ask the students how the car got its potential energy. Explain that you have transformed your mechanical energy into the car and it now has potential energy.

Have the students predict what is going to happen if you release the car. Release the car and explain that the potential energy has become kinetic energy.