What are the physics concept involved in a catapult?

Michael R: What are the physics concept involved in a catapult?
Hi! I need to know what are the Physics concept involved in a catapuilt? How does a cataputl works? HOw does it projects objects? Where does it obtain its energy? Please help me! Thank you in advance!

Answers and Views:

Answer by BbOy_RiDdLeR
It uses the elastic potential energy of the rope tied around that main axle. the flight of the trajectory is kinematics. Both catapults and ballistas work by storing tension either in twisted ropes or in a flexed piece of wood (in the same way an archery bow does, but on a larger scale). all of it is at the following site:

good site: https://science.howstuffworks.com/transport/engines-equipment/question127.htm
https://www.physicsforums.com/archive/index.php/t-72543.html