1. Name the 6 different simple machines.

1. Name the 6 different simple machines 1. Name the 6 different simple machines. lever inclined plane screw wheel and axle wedge pulley

Classify each of the following types of simple machines.

2 lever and wedge

3 wedge

4 screw

5 lever and wedge

6 inclined plane

7 lever

8 lever and wedge

9 lever

10 wedge

11 lever

12 lever

lever and wheel and axle 13 lever and wheel and axle

14 lever

15 pulley

16 lever

17 wedge

18 screw

19 screw

20 wedge

21 lever

22 screw

23 wheel and axle

24 lever and wedge

25 wheel and axle

26 screw

27 wheel and axle

28 wedge

29 wheel and axle

30 lever

31 screw

32 lever

33 wheel and axle - gear

34 lever

35 wedge

36 wheel and axle

37 screw

38 inclined plane

39 lever and wedge

40 inclined plane

41 pulley

42 wheel and axle

43 wedge

44 wheel and axle - gear

45 lever

46 This helps you move an object across the ground because they cut down on the amount of friction between what you're trying to move and the surface you're pulling it against. wheel and axle

47 Examples of this simple machine are used to hold things together. It is made up of an inclined plane wrapped around a cylinder. screw

48 wedge This simple machine can be used to slip things apart or hold a door open. wedge

49 gear This version of a simple machine is a wheel with teeth on it that fit together when the simple machine is turned. These simple machines are used to increase or decrease turning power by changing their size. gear

50 This simple machine can be used to lift a weight. It has a fulcrum, or pivot point, which can be located in the center, near the end or at the end of this simple machine. lever

An inclined plane turned on its side which helps push things apart 51 An inclined plane turned on its side which helps push things apart wedge

52 A heavy object could be rolled up this simple machine, instead of lifting it straight up. Using this simple machine can save effort, although the object must usually cover more distance if this simple machine is used. inclined plane

53 A rope, wheel with a groove in it and a weight make up this simple machine. You can pull down on the rope to lift the weight. pulley

54 The simplest of simple machines because to make it work, nothing moves. inclined plane

55 This makes work seem easier because it changes the direction of motion to work with gravity. pulley

56. Where is the fulcrum, resistance, and effort in this lever?

57. What class of lever is a wheelbarrow? second class

58. Where is the fulcrum, resistance, and effort in this lever?

59. What class of lever is a seesaw? first class

60. Where is the fulcrum, resistance, and effort in this lever?

61. What class of lever is a nutcracker? second class

62. Where is the fulcrum, resistance, and effort in this lever?

63. What class of lever is a door? second class

64. Where is the fulcrum, resistance, and effort in this lever?

65. What class of lever is a broom? third class

66. Where is the fulcrum, resistance, and effort in this lever?

67. What class of lever is a pair of scissors? first class

68. What is a push or pull called? a force

69. Is work done if a person holds 5 textbooks, but doesn’t move? no

70. Is work done if a a dog picks up a stick and carries it to his dog house? yes

71. What is the unit for a force? a newton

72. What is a quantity that measures the effects of a force acting over a distance called? work

73. What is the unit for work? joule

74. What is a Newton·meter? joule

75. In the SI system, what is the approximate weight of an apple? 1 newton

76. What is a quantity that measures the rate at which work is done called? power

77. What is the SI unit for power? watt

78. What is the English unit for power? horsepower

79. Name two ways you can multiply a force by using a simple machine. Machines can change the diretion of an input force or they can increase an output force by changing the distance over which the force is applied.

80. What is the name of a quantity that measures how much a machine multiplies force or distance? mechanical advantage

81. What are the three members of the lever family? lever, pulley, and wheel and axle

82. What are the three members of the inclined plane family? inclined plane, wedge, and screw

83. What is the fulcrum of a lever? the pivoting point of the lever

84. What is a compound machine? a machine consisting of two or more simple machines