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motion & force
unit 2 , lsson 1 & 2 &3
| Term | Definition |
|---|---|
| work | the use of force to move an object some distance in the direction of the force |
| energy | the ability to do work |
| power | the rate at which work is done |
| kinetic energy | the energy of motion |
| potential energy | the energy an object has becuase of its posistion , condition, or chemical posistion |
| mechanical energy | the energy possessed by an object due to its motion and posistion |
| machine | any device that helps people do work by changing the way work is done |
| mechanical advantage | the number of times the machine multiplies the input force |
| lever | a simple machine that has a bar that pivots at a fixed point |
| fulcrum | the point at which a lever pivots |
| wheel and axle | a simple machine that is made of a wheel connected to a similar cyndrical object, the axle. |
| pulley | a simple machine that has a grooved wheel that holds a rope or a cable |
| inclined plane | a simple machine that is a striaght, slanted surface. |
| mechanical efficiency | a comparison of a machines work output with the work input. |
Created by:
18mhogan0503
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