1. Simple Machines

2. the use of force to move an object over a distance

3. work

4. For work to be done, an object has to

5. move

6. When using a simple machine, the number of forces applied are

7. 1

8. a bar that tilts or pivots on a fixed point

9. lever

10. a fixed point on a lever

11. fulcrum

12. What decreases the force needed on a lever?

13. Moving the load closer to the fulcrum

14. lever with the load between the force and the fulcrum
What kind of lever?
lever with the load between the force and the fulcrum

15. Second Class

16. lever with the fulcrum between the effort and load
What kind of lever?

17. First Class Lever

18. lever with the effort between the force and load
What kind of lever?
lever with the effort between the force and load

19. Class 3

20. a simple machine made of a wheel and a rod that turn together

21. Wheel and axle

22. a rod between two wheels

23. axle

24. A big wheel makes the turning force easier, but it will require a longer

25. distance

26. a surface

27. plane

28. a slanted surface

29. Inclined plane

30. What is easier? Lifting something straight up Or Pushing up an inclined plane

31. Inclined Plane

32. Which is easier? Steep slope Flatter slope

33. Flatter slope
harder
easier

34. an inclined plane wrapped around a post

35. Screw

36. Inclined plane requires a longer

37. distance

38. made of two inclined planed put back to back

39. wedge

40. A wedge can be used to _____ and ______

41. Cut and lift

42. A pulley can change the _______ of a force.

43. direction

44. Adding pulleys can _____________ the force needed

45. reduce

46. Which two simple machines are most alike?

47. screw and inclined plane

48. Which simple machine would be best to slice carrot?

49. wedge

50. Which of the following changes the direction of a force but not the amount of force needed to do work?

51. Single pulley

52. How do we use a pulley everyday at school?

53. flagpole

54. What is transferred when work is done?

55. energy

56. Which part of the lever supplies the force to move something?

57. effort

58. Which part of the lever is the part you are trying to move?

59. load

60. What are the two types of forces?

61. Push and Pull

62. This is necessary to get something moving

63. force

64. How many classes of levers are there

65. 3

66. These two simple machines make a screw

67. Wheel and Axle and Inclined Plane

68. If you use a screw driver to open a can of paint, you are using it mostly as a

69. lever

70. If you weigh 80 pounds, and you are lifting an object with one pulley, the object has to weigh how much?

71. 80 pounds or less