Today, I finished my lever project. I made a catapult. The length of the effort arm was 2 9/16 inches. The length of the load arm was 1 1/4 inches. The mechanical advantage was 2.05.
I tested the catapult by launching marbles from the kitchen doorway. They went pretty far (approximately to the entrance of the house).
When I built the catapult, I hade some trouble wrapping the rubber bands. I loved this project so much. I think we should do another project like this for another simple machine.
Hi Alejandro, this was an excellent post. Great job. I’m glad you liked the project!