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Unit 2 Energy
Science
| Term | Definition |
|---|---|
| Work | the transfer of energy to an object by using a force that causes the object to move in the direction of the force |
| Energy | the ability to cause change |
| Power | the rate at which work is done or energy is transformed |
| Kinetic energy | the energy of an object due to the object's motion |
| Potential energy | the energy that an object has because of the position, condition, or chemical composition of the object |
| Mechanical energy | the sum of an objects kinetic energy and potential energy due to gravity or elastic deformation does not include chemical or nuclear energy |
| Machine | a device that helps do work by changing the magnitude and or direction of an applied force |
| Mechanical advantage | a number that tells how many times a machine multiples input force |
| Mechanical efficiency | a quantity usually expressed as a percentage that measures the ratio of work output to work input in a machine |
| Lever | a simple machine that consists of a bar that pivots at a fixed point called a fulcrum |
| Fulcrum | the point on which a lever pivots |
| Wheel and Axle | a simple machine consisting of two circular objects of different sizes, the wheel is the larger of the two objects |
| Pulley | a simple machine that consist of a wheel over which a rope, chain, or wire passes |
| Inclined Plane | a simple machine that is a straight, slanted surface, which facilitates the raising of loads, a ramp |
Created by:
Tizi
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