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


Read this paragraph and choose the correct option from the provided answers:

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.

 Choices:

- battering ram

- rotor

- catapult

- lever


A:
lever