1. i was the logistic again and i was in charge of the mertiral and in the testing part i was choosen to be the pilot and i fire the Catapult.
2 i think we have done the EDP very succesfully becuase we  distribute different job for each of us in the frist place ,maybe we don't have a lot of time to test our production but i think we have done a good job.
3.we made our design after we found it not standing.
4i like the idea that cut the leg of the catapult becuase it's my idea. i don't like the deisgn of the laucher , it should be smaller.
5 gravitational potential energy change to motion energy , and we use force to gain motion energy.



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