The Science Fair Project Guide

With this project you'll send ping pong balls flying through the air with a rubber-band powered catapult. This catapult makes it easy to reproduce the launch angle, and to measure the amount of force applied to the projectile. Armed with this information, can you find ways to keep the ping pong balls flying accurately on target?

Original Link: http://www.sciencebuddies.org/mentoring/project_ideas/ApMech_p008.shtml?from=Home

This project uses a rubber-band powered catapult called the Xpult. The goal of the project is to find launch conditions to reliably propel the payload (a small plastic ball) into the target area (a box or bucket placed a fixed distance from the catapult).