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| the action that results when a force causes an object to move in the direction of the force |
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| the unit used to express work and energy equivalent to the newton meter |
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| the rate at which work is done |
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| the unit used to express power equivalent to joules per second |
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| the work done on a machine; the profuct of the input force and the distance through which it is exerted |
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| the work done by a machince the product of the output force and the distance through which is exerted |
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| a number that tells how many times |
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| a comparison expressed as a percemtage of a machines work output; can be calculated by dividing work output by work input and they multiplying by 100 |
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| a device that helps make work easier by changing the size or direction (or both) of a force |
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| the six machines from which all other machinesare constructed: a lever an inclined plane,a wedge ,a screw, a wheel and axel, and a pully |
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| a machine that is made of two or more simple machines |
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| a simple machine consisting of a bar that pivots at a fixed point, called the fulcrum; there are three classes of levers, based on where the input force, output force, and fulcrum are placed in a relation to the load first class levers, second class levers and third class levers |
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| the fixed point about which a lever pivots |
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| a simple machine that is a straight, slanted surface; a ramp |
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| A machine that is a double inclined plane that moves; a wedge is ofter used for cutting |
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| a simple machine that is an inclined plane wrapped in a spiral |
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| a simple machine consisiting of two circular objects of different sizes; wheelis larger of the two circular objects |
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Definition
| a simple machine consisting of a grooved wheel that holds a rope of cable |
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