1. Simple Machines

2. Definitions
Simple machine—A machine that makes work easier by multiplying a force or changing the direction of a force
Effort– work put into a machine also know as work in or win
Load—work done by the machine, also know as work out or wout
Mechanical Advantage (MA)—Force out/force in
Efficiency=(Work out/work in) * 100%

3. Simple machines
Simple machines do a lot of things, but one thing they never do is multiply work. Why is that?
A compound machine occurs when you put more than one simple machine together.

4. Levers 1st class

5. Levers 1st class

6. Lever 2nd class

7. Lever 2nd class

8. Lever 3rd class

9. Lever 3rd class
What advantages does this type of lever have?

10. Levers in Action
How a backhoe works

11. Lever --Wheel and Axle

12. Lever --Wheel and Axle

13. Lever --Pulley

14. Lever --Pulley

15. Inclined plane
Ramp
Screw
Wedge

16. Lever Ramp

17. Inclined Plane --Ramp

18. Inclined plane --Screw

19. Inclined plane --Screw

20. Inclined plane --wedge

21. Inclined plane --wedge

22. Wedge—Hull Design