Term
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Definition
| transfer of energy by mechanical means; constant force exerted on object in direction of motion times object's displacement |
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| ability of object to produce change in itself or world around it |
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| energy of object from its motion |
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| when work done on an object, change in kinetic energy occurs |
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Definition
| unit of energy; 1 J of work when 1 N of force acts on object displaced 1 m |
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| unit of power; 1 J of energy transferred in 1 s |
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| took making work easier by changing magnitude/direction of force exerted to do work |
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| force person exerts on machine |
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| ratio of resistance force to effort force |
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| ideal mechanical advantage |
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Definition
| displacement of effort force divided by displacement of load |
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Definition
| ratio of output to input work |
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Definition
| machine of 2 or more simple machine connected so resistance force of 1 machine becomes effort force of 2nd machine |
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| rotational kinetic energy |
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Definition
| kinetic energy of object, proportional to object's moment of inertia and square of angular velocity |
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| gravitational potential energy |
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Definition
| stored energy in system from gravitation force btwn. Earth and object |
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Definition
| position where gravitational potential energy is zero |
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| potential energy that may be stored in an object from change in shape |
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Term
| law of conservation of energy |
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Definition
| is a closed, isolated system, energy isn't created or destroyed but conserved |
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Definition
| sum of kinetic and gravitational potential energy of a system |
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Definition
| measure of the internal motion of an object's particles |
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Definition
| kinetic energy before and after collision remains the same |
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Definition
| kinetic energy after collision less than kinetic energy before |
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