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18 Cards in this Set
- Front
- Back
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gravitational potential energy |
energy stored in an object as the result of its vertical position or height; and as the result of the gravitational attraction of the Earth for the object |
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kinetic energy |
energy that a body possesses by virtue of being in motion |
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mechanical energy |
energy possessed by an object due to its motion or its position |
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conservation of energy |
principle stating that the total energy of an isolated system remains constant regardless of changes within the system. |
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work |
force that is applied to an object moves that object (W = F * d) |
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power |
the rate at which work is done |
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simple machines |
simple device for altering the magnitude or direction of a force |
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lever |
stiff bar that rests on a support called a fulcrum which lifts or moves loads |
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pulley |
device with grooved wheels and a rope to raise, lower or move a load |
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incline plane |
a slanting surface connecting a lower level to a higher level |
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wedge |
an object with at least one slanting side ending in a sharp edge, which cuts material apart |
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screw |
inclined plane wrapped around a pole which holds things together or lifts materials |
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wheel & axle |
a wheel with a rod, called an axle, through its center lifts or moves loads |
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mechanical advantage |
the advantage gained by the use of a mechanism in transmitting force; specifically : the ratio of the force that performs the useful work of a machine to the force that is applied to the machine |
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effort (input) force |
effort force is the force that moves an object over a distance by overcoming a resistance force; the formula for force is force = mass x acceleration or F = MA and is measured in newtons |
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resistance (output) force |
the force which an effort force must overcome in order to do work on an object via a simple machine; measured in newtons or in pounds-force. |
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effort (input) distance |
the distance over which a force was applied |
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resistance (output) distance |
the distance of reactive force like friction is applied against the effort |
