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Unit 2, Less 1,2,3
vocab
| Term | Definition |
|---|---|
| work | the use of force to move an object some distance in the direction of force |
| energy | ability to do work |
| power | rate at which work is done |
| kinetic energy | energy of motion |
| potential energy | energy an object has because of its 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 a machine multiplies the input force |
| mechanical efficiency | a comparison of a machine's work output with its work input |
| lever | a simple machine that has a bar that pivots at a fixed point |
| fulcrum | a fixed point |
| wheel and axle | a simple machine that is made of a wheel connected to a small cylindrical object, the axle |
| pulley | simple machine that has a grooved wheel that holds a rope or a cable |
| inclined plane | a simple machine that is a straight, slanted surface |
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