1. Simple Machines

2. What do machines do? Why do we need machines?

4. Common Simple Machines…

5. 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: a. Machineg. Pulley b. Simple machinesh. Wheel & Axle c. Worki. Inclined Plane d. Forcej. Wedge e. Work input/Work outputk. Screw f. Leverl. Compound Machine

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

7. 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

8. OR YES NOYESNO

9. 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

10. 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

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

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

13. The Six Simple Machines

14. Lever

15. The Six Simple Machines LeverPulley

16. The Six Simple Machines LeverPulleyWheel & Axle

17. The Six Simple Machines LeverPulleyWheel & Axle Inclined Plane

18. The Six Simple Machines LeverPulleyWheel & Axle Inclined PlaneWedge

19. The Six Simple Machines LeverPulleyWheel & Axle Inclined PlaneWedgeScrew

20. 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)

21. The Six Simple Machines Lever

22. First-Class LeverSecond-Class LeverThird-Class Lever Elementary SchoolMiddle SchoolHigh School

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

24. The Six Simple Machines LeverPulley

25. Types of Pulleys:

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

27. The Six Simple Machines LeverPulleyWheel & Axle

28. The Six Simple Machines LeverPulleyWheel & Axel Inclined Plane

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

30. The Six Simple Machines LeverPulleyWheel & Axel Inclined PlaneWedge

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

32. The Six Simple Machines LeverPulleyWheel & Axel Inclined PlaneWedgeScrew

33. The Six Simple Machines

34. Activities Museum of Science & Industry Lemelson Center’s Invention at Play

35. 1. What would be easier, a steep inclined plane or a shallow inclined plane?

36. 2. What would be easier, a wide wedge or a skinny wedge?

37. 3. What would be easier, a long, skinny screw or a short, fat screw?

38. 4. What would be easier, the fulcrum in the middle or the fulcrum to one side of the lever?

39. 5. What would be easier, a short axle or a long axle?

40. 6. What would be easier, a wide rope or a skinny rope?