2. Forces How do we describe it? Size (magnitude) Direction
What is a Force?
Push or Pull
What does it do?
Causes Motion
How do we describe it?
Size (magnitude)
Direction

3. What are the 7 simple machines?
Lever
Inclined Plane
Wedge
Screw
Wheel and Axle
Gear
Pulley

4. Why do we use simple machines?
To make life easier!
Simple Machines change forces:
change the direction
change the size
change both

5. How do they work? Conservation of Energy Work and Energy are related
Scientific Definition of Work
Work = Force x Distance
distance in direction of force

6. Lever

7. Incline Plane

8. Wedge

9. Screw

10. Wheel and Axle

11. Gears

12. Pulley
Change Force Direction
Same Force Size