Answer the following question given this paragraph: 

A lever is a simple machine that consists of a bar that rotates around a fixed point called the fulcrum. There are three classes of levers. Depending on its class, a lever may have an ideal mechanical advantage that is less than, equal to, or greater than 1. First-class levers also change the direction of the input force.


Q: What simple machine consists of a bar that rotates around a fixed point called the fulcrum?


A:
lever