1. SIMPLE MACHINES

2. Machines do the following
Transform energy from one form to another
Multiply force (pulleys can loft more with less force)
Multiply speed (bike wheels move faster with gears; swinging a bat)
Change direction of a force (flag pole-pull down to raise a flag)

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

4. Inclined Plane Inclined planes DO NOT move
No less work but does allow for less effort

5. Wedge
2 inclined planes back to back
Increases force

6. Screw Inclined Plane wrapped around a cylinder
2 parts body (cylinder) and thread

7. Input Force (IF) or Effort Force (EF)
Parts of a Lever Page 166
Fulcrum
Input Force (IF) or Effort Force (EF)
Output Force (OF) or Load Resistance (LR)

8. Types of Levers pg 166 and 168
1st Class Lever-fulcrum is between the IF/EF and OF/LR
(pliers)
2nd Class Lever-OF/LR is between the fulcrum and IF/EF
(wheel barrow)
3rd Class Lever- IF/EF is between the fulcrum and OF/LR
(arm)

9. Wheel and Axle Wheel connected to a pole
Modified lever: center axle is a fulcrum, wheel is a lever rotating in a circle

10. Pulley Grooved wheel that turns around an axle
Changes the direction of force

11. FAMILIES Lever Family Inclined Plane Family Levers 1st, 2nd 3rd Class
Wheel and Axle
Pulley
Inclined Plane Family
Inclined Plane
Wedge
Screw