1. Simple Machines

2. First, rank the following words from 0-5 (0= you have never heard of this word & 5= you know the word VERY well). Second, explain what the following terms mean in your own words:
Machine
Simple machines
Work
Force
Work input/Work output
Lever
-Pulley
-Wheel & axle
-Inclined plane
-Wedge
-Screws
-Compound machine

3. Machine YOURS: TEXTBOOK:
A machine is a device that makes work easier by changing the size or direction of a force.
Examples: wheelchair, scissors, chopsticks

4. Simple Machines YOURS: TEXTBOOK:
A machine or simple device without moving parts.
Examples: lever, pulley, wheel & axle, inclined plane, wedge, screw

5. Work
YOURS:
TEXTBOOK:
Work is the transfer of energy to an object by using a force that causes the object to move in the direction of the force.
Work is done on an object if two things happen: 1) the object moves as a force is applied, 2) the direction of the object’s motion is the same as the direction of the force.
Examples: pushing a ball up a hill

6. Work or Not Work? OR OR
YES NO
YES NO

7. Force YOURS: TEXTBOOK:
A push or a pull exerted on an object in order to change the motion of the object; force has size and direction.
Examples: people, bulldozer, static electricity

8. Work Input/Work Output
YOURS:
TEXTBOOK:
Work input is the work done on the machine.
Work out put is the work done by the machine.
Examples: opening a paint can

9. The Six Simple Machines

10. The Six Simple Machines

11. Lever YOURS: TEXTBOOK:
A lever is a simple machine that has a bar that pivots at a fixed point, called a fulcrum.
Examples: first-class lever (see saw), second-class lever (wheelbarrow or soda bottle opener), third-class lever (lifting weights or hammering a nail)

12. The Six Simple Machines
Lever

13. Three Classes of Levers
First-Class Lever
Second-Class Lever
Third-Class Lever
Elementary School
Middle School
High School

14. Three Classes of Levers
First-Class Lever
Second-Class Lever
Third-Class Lever
2nd class- the load is between the fulcrum and the force
3rd class- the force is between the load and the fulcrum
Elementary School
Middle School
High School
1st class- fulcrum is placed between the load and the force

15. Pulley YOURS: TEXTBOOK:
A simple machine that has a grooved wheel that holds a rope or a cable.
Examples: fixed, moveable, block and tackle

16. The Six Simple Machines
Lever
Pulley

17. Types of Pulleys:

18. Wheel & Axle YOURS: TEXTBOOK:
A simple machine consisting of two circular objects of different sizes.
Examples: car’s wheel & axle, faucet

19. The Six Simple Machines
Lever
Pulley
Wheel & Axel

20. Inclined Plane YOURS: TEXTBOOK:
A simple machine that is a straight, slanted surface; a ramp.
Examples: ramp or slide

21. The Six Simple Machines
Lever
Pulley
Wheel & Axel
Inclined Plane

22. Wedge YOURS: TEXTBOOK:
A simple machine that is made up of two inclined planes that move; often used for cutting.
Examples: knife, axe, door stop

23. The Six Simple Machines
Lever
Pulley
Wheel & Axel
Inclined Plane
Wedge

24. Screw YOURS: TEXTBOOK:
A simple machine that consists of an inclined plane wrapped around a cylinder.
Examples: screw, light bulb

25. The Six Simple Machines
Lever
Pulley
Wheel & Axel
Inclined Plane
Wedge
Screw

26. Compound Machine YOURS: TEXTBOOK:
A machine made up of more than one simple machine.
Examples: manual can opener