what simple machine is a catapult
Rating Newest Oldest. Best Answer: The main simple machine in a catapult is a lever. The lever is the arm of the catapult. Also if there are wheels on the bottom of the catapult to move it that too is a simple machine. If there are screws used to construct the catapult there is another simple machine.And lastly if there is a pulley system to pull the lever arm back to arm the catapult that is also a simple machine.Source(s):BMM Â· 6 years ago.f there are screws used to construct the catapult there is another simple machine. And lastly if there is a pulley system to pull the lever arm back to arm the catapult that is also a simple machine. Source(s): BMM Â· 6 years ago.