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18 Cards in this Set
- Front
- Back
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Work
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When a force causes an object to move in the same direction as the force
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Force
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A push or pull
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Spring Scale
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Instrument used to measure force
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Newtons
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The unit used to measure force
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Simple Machine
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A device that makes doing work easier
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Effort Force
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The force you put in; sometimes called input force
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Load
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The object that a machine moves, stops, or changes; sometimes called the output force
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Lever
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A straight bar or rod that rotates about a fixed point
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Fulcrum
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The fixed point that a lever rotates around
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Pulley
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A grooved wheel with a rope or cable around it
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Inclined Plane
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A flat, sloped surface or ramp
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Wedge
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An inclined plane that moves; can have one or two sloping sides
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Screw
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An inclined plane wrapped around a cylinder or post
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Wheel and Axle
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Two circular objects of different sizes that are attached and rotate together
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Fixed Pulley
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A pulley that stays in one place and changes the direction of your force
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Movable Pulley
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A pulley that is attached to the object being lifted and allows you to use less force over a longer distance
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Block and Tackle System
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Two or more pulleys with a rope or cable threaded between them and used to lift an object
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Compound Machine
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Two or more simple machines working together; also called complex machine
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