Simple+Machine+Group+2

6/10/11

What is a catapult?
A catapult is a device used to hurl a projectile a very far distance. It was invented by the ancient Greeks.

What type of simple machine is it?
It is a lever and a pulley, and a wheel and axle.

A trebuchet is a type of catapult that uses counterbalance weights to throw the projectile, which is contained in a leather pouch.

What type of simple machine is it?
It is a lever and a pulley, but it also has a wheel and axle.