Embedded Files
This is my Fire Away Project. We were told to make a catapult that could be no bigger or wider than 1 meter. We were supposed to try to make our catapult shoot a clay ball as far as possible.
This is my proof of efficacy document where I put all of the modifications I did on my project. We were required to do a total of eight different modifications and try them out to see if it made the catapult better. It also has the calculations we made.
Process:
Process:
We started with being told all of our requirements that we must have on our project. First it couldn't be bigger than an imaginary meter bubble. We then went to go and start our build. The first thing we grabbed was a base. We found a circle base that was 31 cm wide that would well suit our catapult. We then found two pieces of wood that were 37 cm tall. We then found a middle piece of PVC pipe to have our arm swing on. We drilled a hole through both of our wood pieces close to the top. Then we drilled our arms to the base with a 5.5 cm long gap between them. We then found a strong piece of wood that was both thin and long. We drilled the same size hole in that and slid our PVC pipe through both of the arms and the firing arm. We then added PVC caps to both sides to secure the pipe to the wood tightly. We put a nail on the bottom of our firing arm and another two on the base. Then we added about ten rubber bands for our spring energy. Next a the bottom of a solo cup that has a 2 cm rim as a basket to hold the clay ball we were shooting.Then we added rubber bands around the two arms as a sort of stopper so that it would slow down over a short period of time rather than smacking into a peice of wood. Finally throughout the way we kept on adding more rubber bands until we thought our wood was going to snap, the final number of rubber bands was 21. We then tested our catapult many times and our catapult when an average of over 55 meters but would vary on distance after that point.
Page updated
Report abuse