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18 Cards in this Set
- Front
- Back
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Work
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Force exerted on an object that causes it to move.
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Joule
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A unit of work equal to one newton-meter.
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Power
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The rate at which work is done.
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Machine
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A device that changes the amount of force exerted, the distance over which a force is exerted, or the direction in which force is exerted.
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Input Force
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The force exerted on a machine.
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Output Force
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The force exerted on an object by a machine.
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Input Work
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The work done on a machine as the input force acts through the input distance.
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Output Work
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The work done by a machine as the output force acts through the output distance.
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Mechanical Advantage
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The number of times a machine increases a force exerted on it.
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Efficiency
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The percentage of the input work that is converted to output work.
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Inclined Plane
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A simple machine that is a flat, sloped surface.
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Wedge
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A simple machine that is an inclined plane that moves.
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Screw
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A simple machine that is an inclined plane wrapped around a central cylinder to form a spiral.
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Lever
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A simple machine that consists of a rigid bar that pivots about a fixed point.
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Fulcrum
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The fixed point around which a lever pivots.
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Wheel and Axle
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A simple machine that consists of two attached circular or cylindrical objects that rotate about a common axis, each one with a different radius.
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Pulley
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A simple machine that consists of a grooved wheel with a rope or cable wrapped around it.
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Compound Machine
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A device that combines two or more simple machines.
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