![]() If the cup is wobbly, encourage the student to apply more tape around all sides and around the catapult arm.If the catapult arm is wobbly, check to make sure that the end is securely taped to the bottom front of the catapult.Attaching the rubber band can be tricky for some students.Encourage students to work together: one person holds the shape in place while another person tapes it together. ![]() ![]() Some students may have difficulty forming the pyramid shape.It is difficult to launch by grasping the cup or pushing on the middle of the catapult arm. If students are having trouble launching their catapult, be sure that they have a little bit of skewer exposed at the top of the arm and that they are launching according to the technique displayed in step 6.Use pliers to straighten the paper clip and cut it in half. fire!) - students may only launch upon hearing 'fire!' and may not fire if anyone is retrieving their cork. Grab the rubber band and secure it around the bolt with the nut. The catapults design makes it easy to measure and repeat how hard the ball is launched and its direction, so you can find the right catapult. Using a rubber-band-powered catapult you will send ping pong balls flying through the air. To facilitate this, you can select a responsible student to initiate a countdown (3. But only if you could aim it reliably With this science project, you will try your hand at catapult technology. This project is a little dangerous! If you are confined indoors, be sure to designate a firing range and have students launch and retrieve all of the corks at once.
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