Explo Engineering and Desing
In engineering we just recently built a catapult! We had to build the catapult then we had to do all sorts of tests to see what changes made the launch better. I did three different angles of launch before I found the one that launched the farthest.
Now we are building these small cars called dragsters. In the back of each dragster there is a hole in that hole you place a Co2 cartridge. You puncture a hole in the Co2 cartridge and watch the car go.