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16 Cards in this Set
- Front
- Back
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machine |
any device that makes doing something easier |
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simple machine |
a device with few, if any, moving parts that makes it easier to do work |
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compound machine |
a device formed when two or more simple machines are combined |
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energy |
the ability to do work |
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work |
what is necessary for a force to move an object through a distance |
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power |
the amount of work done per unit of time |
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efficiency |
the ratio between the work done by a machine and the work put into it |
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lever |
a simple machine consisting of a bar and a pivot point |
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fulcrum |
the pivot point in a lever |
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wheel and axle |
a simple machine that consists of a wheel that applies an effort force and a smaller axle that produces an output force |
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pulley |
a grooved wheel that turns by the action of a rope in the groove |
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inclined plane |
a straight, slanted surface that can multiply an effort force |
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screw |
a simple machine made of an inclined plane wrapped around a central bar that can multiply an effort force |
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watts |
unit for power |
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wedge |
an inclined plane that changes the direction of an applied force |
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joules |
unit for work |
