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15 Cards in this Set
- Front
- Back
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Lever
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A beam, free to pivot aropund a point, used to move a load. It reduces effort.
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Lever Arm
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A beam, free to pivot around a point
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Fulcrum
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The point at which a lever arm pivots
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Load
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The weight or resistance that is moved using a simple machine.
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Effort
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The force applied to move a load using a simple machine. Effort is measured in the metric measurement called Newtons.
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Newton
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The metric unit used to measure force.
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User
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The person who applies the effort or uses the lever.
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Machines
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Devices for doing work.
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Simple Machines
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Machines that make work easier for us by letting us apply less effort over a greater distance, or provide a gain in effort over a shorter distance. They provide us a gain in effort or a gain in distance.
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What are the 6 Simple Machines?
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1. the lever (broom, hammer, fork, crowbar, spatula)
2. the wheel and axle (windmill, door knob, rolling pin) 3. the pulley (used with garage doors, windows, flaglines, miniblinds) 4. the inclined plane (skateboard/bike ramp, rollercoaster, ladder) 5. the wedge (doorstop, back wedge, sledge hammer) 6. the screw (door lock, thermos cap) |
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Complex Machines
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More involved than simple machines, these machines are often powered by motors. Examples are: power tools, washing machines, cars, and airplanes
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What is Mechanical Advantage?
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A ratio of the load or resistance to the effort or force.
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As the load gets closer to the fulcrum, the effort needed to lift the load...
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decreases
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As the load gets farther from the fulcrum, the effort needed to lift the load...
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increases
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Advantage
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A gain in effort or distance or a change of direction resulting from the use of a simple machine.
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