Class 3 Catapult

Project Snapshot

A class 3 lever puts the load on one end, the fulcrum on the other, and the effort somewhere in between.

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This project illustrates this fundamental tool while also delivering some high-flying projectiles!

Click to expand

Tools and Materials

• Hot glue gun

• Glue sticks

• Masking tape

• Craft sticks

• 3-1/2" rubber bands

• 1/2" craft cubes

• Cubes with holes

• Plastic portion cup

• Tool to cut or break craft sticks

Tips and Troubleshooting

If the hinge is breaking or falling out of the cubes, then...

• Just use 1 rubber band. 2 or more may put too much strain on the dowel

• Make the dowel slightly longer so it can't fall out from between the cubes with holes