1. Physical and Biological
Science
Name: Jason Marshall

2. Simple Machines (Levers)

3. How do we open a bottle?

4. Why is it easier to use an opener?

5. Levers
 A lever is a machine that turns about a pivot. It consist of the effort (the
applied force), load (the object on which the force is being applied) and
pivot (point where most movement occurs) .
 A lever provides mechanical advantage. Mechanical advantage refers to
how much a simple machine multiplies an applied force. Whatever little
force we apply, the lever will multiply it. This means when using a lever we
don’t have to apply as much force.
 We can use the least amount of effort. This makes our work easier
 The location of the effort, load, and pivot will determine the type of lever.

6. Types of Levers:
 First Class Lever
 Second Class Lever
 Third Class Lever

8. Examples

9. Conclusion
 A lever makes work easier for man because it allows us to exert less force.
 A lever consist of consist of the effort (the applied force), load (the object on which
the force is being applied) and pivot (point where most movement occurs) .
 There are three types of levers:
 1st class lever
 2nd class lever
 3rd class lever