Catapult's

Me and my buddy Eva have designed and built a strong powerful  catapult by following the full designing process and collaborated well to create the model we have kept going back to improve on the model so we can make it better,in this school project we first started seeing other people designs and making them and then we were asked to design a stronger,better one.When we tested them all including our one and compared them with the other peoples the results were our catapult was better than all the other people we tried from.