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Unit 2 Energy
Science
| Term | Definition |
|---|---|
| work | the transfer of energy to an object by using a force that causes the object to move in the direction of the force |
| energy | the strength and vitality required for sustained physical or mental activity |
| power | the ability to do something or act in a particular way |
| kinetic energy | energy that a body possesses by virtue of being in motion |
| potential energy | the energy possessed by a body by virtue of its position relative to others, stresses within itself, electric charge, and other factors |
| mechanical energy | sum of kinetic and potential energy in an object that is used to do work |
| machine | a device that helps do work by changing the magnitude and/or direction of an applied force |
| mechanical efficiency | a quantity, usually expressed as a percentage, that measures the ratio of work output |
| lever | a rigid bar resting on a pivot, used to help move a heavy or firmly fixed load with one end when pressure is applied to the other |
| mechanical advantage | a number that tells how many times a machine multiplies input force |
| fulcrum | the point on which a lever rests or is supported and on which it pivots |
| wheel and axle | a simple lifting machine consisting of a rope that unwinds from a wheel onto a cylindrical drum or shaft joined to the wheel to provide mechanical advantage |
| pulley | a simple that consists of a wheel over which a rope, chain, or wire passes |
| inclined plane | a simple machine that is a straight, slanted surface, which facilitates the raising of loads; a ramp |
Created by:
carington33
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