1. Compound Machines

2. COMPOUND MACHINES
A compound machine is a combination of two or more simple machines that operate together. 2

3. COMPOUND MACHINES
Many familiar compound machines, such as a car, a washing machine, or a clock, are combinations of hundreds or thousands of simple machines. 3

4. Compound Machine Corkscrew
Inclined Plane
Wedge
Screw
Lever
Wheel and Axle

5. Compound Machine Jack
Inclined Plane
Wedge
Screw
Lever

6. A Wedge in a Compound Machine: Stapler
Staples are wedges: they cut through paper because their ends are pointed in a wedge shape.
Simple machines in a stapler:
Wedge
Lever

7. A Wedge in a Compound Machine: Scissors
The cutting edge of scissors is a wedge.
Simple machines in a pair of scissors:
Wedge
Lever