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1. Simple Machines Mrs. Chastain Third Grade Friday, August 16, 13

2. Machine A tool that helps us do work Friday, August 16, 13

3. Machine A tool that helps us do work Friday, August 16, 13

4. Machine A tool that helps us do work Machines help us by: Friday, August 16, 13

5. Machine A tool that helps us do work Machines help us by: 1. Changing the amount of force on an object. Friday, August 16, 13

6. Machine A tool that helps us do work Machines help us by: 1. Changing the amount of force on an object. Friday, August 16, 13

7. Machine A tool that helps us do work Machines help us by: 1. Changing the amount of force on an object. 2. Changing the direction of the force. Friday, August 16, 13

8. Force a push or pull that changes the motion or shape of an object Example: I push a bookshelf to move it. Friday, August 16, 13

9. Force a push or pull that changes the motion or shape of an object Example: I push a bookshelf to move it. Friday, August 16, 13

10. Energy the ability to do work Example: I must have energy to run the mile. Friday, August 16, 13

11. Energy the ability to do work Example: I must have energy to run the mile. Friday, August 16, 13

12. Work the result of force moving an object Example – Picking up something heavy is hard work! Friday, August 16, 13

15. Gravity Gravity is the force that constantly pulls objects toward Earth. Friday, August 16, 13

16. Gravity Gravity is the force that constantly pulls objects toward Earth. Friday, August 16, 13

17. Simple Machines have few or no moving parts Friday, August 16, 13

18. Simple Machines have few or no moving parts Friday, August 16, 13

19. Simple Machines have few or no moving parts • Lever Friday, August 16, 13

20. Simple Machines have few or no moving parts • Lever • Inclined Plane Friday, August 16, 13

21. Simple Machines have few or no moving parts • Lever • Inclined Plane • Wedge Friday, August 16, 13

22. Simple Machines have few or no moving parts • Lever • Inclined Plane • Wedge • Screw Friday, August 16, 13

23. Simple Machines have few or no moving parts • Lever • Inclined Plane • Wedge • Screw • Wheel and Axel Friday, August 16, 13

24. Simple Machines have few or no moving parts • Lever • Inclined Plane • Wedge • Screw • Wheel and Axel • Pulley Friday, August 16, 13

25. Lever made of a board or bar (arm) set on top of a fulcrum used to lift weight Example: seesaw, crowbar, baseball bat, rake Friday, August 16, 13

30. Inclined Plan a slanted surface to make lifting easier Example: ramp, stairs Friday, August 16, 13

33. Wedge two inclined planes together used to raise an object or split an object Example: knife, door wedge, ax Friday, August 16, 13

36. Screw an inclined plane wrapped around a pole or shaft that is used to hold materials together or drill holes Example: drill bit, screws Friday, August 16, 13

40. Wheel and Axel a wheel that turns on a post to help move things quickly and easily Example: steering wheel, doorknob, screwdriver Friday, August 16, 13

41. Wheel and Axel a wheel that turns on a post to help move things quickly and easily Example: steering wheel, doorknob, screwdriver Friday, August 16, 13

42. Pulley made of rope and string wound around a reel to change the direction of a force Example : flagpole, clothesline, cranes, fishing reel Friday, August 16, 13

43. Pulley made of rope and string wound around a reel to change the direction of a force Example : flagpole, clothesline, cranes, fishing reel Friday, August 16, 13

44. Compound Machine two or more simple machines Examples: Bike Car Friday, August 16, 13

45. Compound Machine two or more simple machines Examples: Bike Car Friday, August 16, 13

46. How Work is Done Energy Force Function Work is done! Friday, August 16, 13

47. How Work is Done Energy Force Function Work is done! Friday, August 16, 13

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Introduction to Simple Machines

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Introduction to Simple Machines