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work, energy,& power
unit 2 lessons 1-3
| Term | Definition |
|---|---|
| work | force used to move an object some distance in the direction of the force |
| energy | ability to do work |
| power | the rate at which work is done |
| kinetic energy | the energy of motion |
| potential energy | the energy of an object because of position, condition, or chemical composition |
| mechanical energy | energy possessed by an object due to its motion and position |
| machine | any device that helps people do work by changing the way work is done |
| mechanical advantage | number of times the machine multiplies the input force |
| mechanical efficiency | a comparison of a machine's work output with the work input |
| lever | a simple machine with a bar that pivots around a fixed point |
| fulcrum | the fixed point a lever pivots around |
| wheel and axle | a simple machine that is made of a wheel connected to a smaller cylindrical object, the axle |
| pulley | a simple machine that has a grooved weel that holds a rope or a cable |
| inclined plane | a simple machine that is a straight, slanted surface |
Created by:
18phans0918
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