![]() However, if you start changing multiple things at once, you no longer have a fair test and your results may be too confusing to interpret. In this picture, the launch angle is 30 degrees.Īim for the target, and fire away! Remember there are four things you can change: the type of ball, the number of rubber bands, the launch angle, and the pull-back angle. Measure the launch angle by reading the tick mark that lines up with the bottom of the catapult base (on the right). ![]() In this picture, the pull-back angle is about 60 degrees. Measure the pull-back angle by reading the tick mark that lines up with the top of the launch arm (on the left).
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