A catapult is a simple machine. It uses a lever to move a load around a fulcrum using force. In this activity you will build a catapult that works by converting potential energy into kinetic energy. When you press down on the bottle cap, you add potential energy, and when you release the catapult, you are converting to kinetic energy.
Potential Energy is energy that is stored inside an object just before it sets into motion. Think about how an elastic feels when you stretch it apart to sling shot it; before you release it, it is bursting with stored energy.
Kinetic Energy is the energy of motion. This is when you release the elastic and it sling shots across the room!
A fulcrum is the pivot point around which a lever will turn. When you apply force on one side of the lever, the fulcrum will re-direct the force in another direction.
- 7 Popsicle Sticks
- Bottle cap or spoon
- 4 Elastics
- Objects to launch like marshmallows, cotton balls, or small plastic balls
- Get creative with the materials and try using different things you find around your home!
Step by Step Instructions
Test out your catapult creations!
Turn it into a game by drawing a target, or by placing baskets at different distances to score points.
Post an image of your catapult and on Facebook and tag Pinnguaq!
Try out an up-cycle catapult activity using recyclables and household items by Go Science Girls!
Share Your Work With Us! We want to see the awesome things you’re all creating with Pinnguaq. Share online with us and tag @pinnguaq on Facebook, Twitter or Instagram for your work to be featured. Don’t forget to include the hashtag #LearnWithPinnguaq! Keep tuning into Pinnguaq for more lesson and fun activities!