2. What Simple Machines are
They are the most basic machines
There are 6 types of simple machines
All other machines are combinations of simple machines
Simple machines give mechanical advantage

3. mechanical advantage
Think: How the dolly & ramp makes moving boxes easier
Tells how much a machine multiplies force or increases distance
Mechanical advantage makes it easier to do things.

4. The Lever family
All levers have a rigid arm that turns around a point called a fulcrum.
There are 3 classes of levers
1st class – fulcrum is in the middle
2nd class – fulcrum is at one end & force is applied to the other end
3rd class – Fulcrum at one end & force applied to the middle of the arm.

5. Pulleys are modified levers
The point at the middle of the pulley is the fulcrum
The rest of the pulley behaves like the arm of a lever
Think: Why the wheel is the fulcrum.

6. Wheel and axle Wheels are also like levers
The axle of the wheel is the fulcrum
The outer edge of the wheel is the arm

7. Incline Plane Family Incline planes multiply and redirect force
A wedge is a modified incline plane
A screw is an incline plane rapped around a cylinder.
Think: Why this road does not go straight up the hill.

8. Compound machines Is a machine made of more than one simple machine
Example: a pair of scissors has 2 levers and a wedge
Think: Which simple machines are in a bicycle.

9. Summary Review How many simple machines are there?
What are the 2 parts of a lever?
What family of simple machines is a wedge a part of?
Write 4 sentences about how you use simple machines to make every day tasks easier.