Term
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Definition
`the product of the force applied on an object multiplied by the distance the object moved
w = F x d
work = force x distance |
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Term
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Definition
| the SI unit of energy; equal to 1 Newton-meter of work |
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Term
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Definition
one- or two-part devices that make work easier
Examples: lever, wheel and axle, pulley,
inclined plane, wedge, screw |
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Term
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Definition
a rigid bar capable of turning about a fulcrum
which can be first, second, and third class |
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Term
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Definition
| the fixed point about which a lever turns |
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Term
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Definition
the method for computing the amount of force exerted by levers with unequal arms
w 1 d 1 = w 2 d 2 |
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Term
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Definition
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Term
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Definition
a lever in which the fulcrum is located between
the effort and the resistance |
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Term
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Definition
| the force that must be applied to a simple machine to make it produce work |
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Term
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Definition
| the distance from the fulcrum to the effort |
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Term
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Definition
| the force against which a simple machine works; opposition to the flow of electrons |
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Term
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Definition
| the distance from the fulcrum to the resistance |
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Term
| mechanical advantage (M.A.) |
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Definition
the amount by which a machine magnifies effort (force); the "force-multiplying ability" of a machine
Mechanical Advantage = resisting force/applied force
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Term
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Definition
| a lever in which the resistance is located between the fulcrum and the effort |
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Term
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Definition
a lever in which the effort is applied between
the fulcrum and the resistance |
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Term
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Definition
| modified lever in which the effort arm and the resistance arm revolve around a central fulcrum |
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Term
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Definition
| a modified lever consisting of a rope that moves around a grooved wheel; can be movable or fixed |
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Term
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Definition
| an arrangment of fixed and movable pulleys connected by ropes; has a high mechanical advantage |
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Term
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Definition
states that any reduction in the effort force will be paid for by an increased distance through
which that force must pass |
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Term
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Definition
| a slanted surface used to raise objects |
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Term
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Definition
| two inclined planes placed "back-to-back" |
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Term
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Definition
| an inclined plane wound around a cylinder or cone |
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Term
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Definition
| the distance between two adjacent threads on a screw |
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Term
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Definition
| approximating an answer when an extremely accurate one is not needed |
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Term
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Definition
| the percent of work input returned as useful output |
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Term
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Definition
the amount of work done in a given period of time;
the rate of doing work
Power = Work / time
or
P = W/t
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Term
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Definition
| the amount of power produced by 1 joule (newton . meter) of work in one second or the SI unit of power |
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