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Unit 2 Book 2
work, Energy, and Power
| Term | Definition |
|---|---|
| Work | the use of a force to move an object some distance in the direction of the force |
| Energy | the ability yo 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 compostion |
| Mechanical Energy | the 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 | the number of times the machine multiplies the input force |
| Mechanical efficiency | is a comparison of a machine's work output with the work input |
| Lever | a simple machine 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 smaller cylindrical 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 straight, slanted surface. |
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