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work energy and mach
unit 2 lessons 1 2 3
| Term | Definition |
|---|---|
| work | the use of force 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 an object has because of its position,condition or chemical composition |
| mechanical energy | the energy possessed by an object due to its motion and position |
| machine | and 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 |
| mechanical efficency | comparsion of a machines work output with the input |
| lever | a simple machine that has a bar that pivots at a fixed point |
| fulcrum | a fix point |
| wheel and axle | a simple machine that is made of a wheel connected to a smaller cylinder object,the axles |
| pulley | a simple machine that has grooved wheel that holds a rope or a cable |
| inclined plan | a simple machine that is straight, slanted surface |
Created by:
18byoung0901
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