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12 Cards in this Set
- Front
- Back
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The six simple machines:
1 2 3 4 5 6 |
1. lever
2. wheel and axle 3. pulley 4. inclined plane 5. wedge 6. screw |
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The ___ is one of the most versatile of all the simple machines.
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lever
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A lever consists of:
1 2 |
1. bar or beam
2. pivot |
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The pivot point upon which the beam rests is called the ____ of the lever.
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fulcrum
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In the __ ___ levers, the input and output forces are on opposite sides of each other with the fulcrum in the center.
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first-class
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The effort force is applied by the ______ arm and the resistance is moved by the _____ arm.
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effort arm
resistance arm |
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A first-class lever ______ the direction of the effort force.
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reverses
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Examples of first-class levers are:
1 2 |
1. seesaw
2. scissors |
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In __ ____ levers, the fulcrum is on one end and the effort on the other end, with the resistance in the middle.
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second-class
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A ______ is an example of a second class lever.
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wheelbarrow
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___ ___ levers have the fulcrum at one end, the resistance on the other end, and the effort in the middle.
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Third-class lever
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___ and __ ___ are examples of third class levers; as well as your own forearm.
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Brooms and baseball bats
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