A lever allows us to gain a mechanical advantage in moving an object or in applying a force to an object.

The lever has three part:

  • The effort (the force applied to the machine)
  • The load (the force exerted by the machine)
  • The pivot point (fulcrum)

The mechanical advantage is that you can move a heavy object using less force than the weight of the object, you can propel an object faster by applying a force at a slower speed, or you can move an object further than the distance you apply to the lever

Parts of lever

There are three common types or classes of levers, depending on where the fulcrum and applied force is located.

Class 1 lever

Class 2 lever

Class 3 lever

Laboratory Worksheet