1. Simple Machines
14.4

2. Simple Machines
The most basic of all machines are called simple machines.
There are six types of simple machines.
These six machines are divided into two families:
The Lever Family
The Inclined Plane Family

3. 6 Simple Machines
Lever
Inclined Plane
Pulley
Wedge
Wheel and Axle
Screw

4. Lever, Pulley, Wheel and Axle
The Lever Family
Lever, Pulley, Wheel and Axle

5. Lever Levers are divided into three classes.
All levers have a fulcrum, point of input force, and point of output force.
The location of these three things determines which class lever you have.
The fulcrum is where the bar rotates.

6. First-Class Lever In a first-class lever the fulcrum is in the middle.
Examples:
Seesaw
Scissors
Tongs

7. Second-Class Lever
In a second-class lever the Output Force is located in the middle.
Examples:
Wheelbarrow
Nutcracker
Nail Clippers

8. Third-Class Lever
In a third-class lever the Input Force is located in the middle.
Examples:
Baseball Bat
Broom
Door
Tweezers

9. Pulley A pulley can be used to lift a heavy load.
It consists of a rope that fits into a groove in a wheel.

10. Wheel and Axle A wheel and axle is just a wheel attached to an axle.
Example:
Steering Wheel
Screwdriver

11. Inclined Plane, Wedge, Screw
Inclined Plane Family
Inclined Plane, Wedge, Screw

12. Inclined Plane
An inclined plane is a slanted surface used to move an object to a different height.
Example:
Ramp

13. Wedge
A wedge is a V- shaped object.
Example: Ax
Knife
Zipper

14. Screw A screw is an inclined plane wrapped around a cylinder.
Examples:
Screw
Nuts

15. Compound Machine
A compound machine is a machine that is made of more than one simple machine.