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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. |
| Power | The rate at which work is done or energy is transformed. |
| Energy | The ability to cause change. |
| Kinetic Energy | The energy of an object that is due to the object's motion. |
| Potential Energy | The energy that object has because of the position, condition, or chemical composition of the object. |
| Mechanical Energy | The sum of an object's kinetic energy and potential energy due to gravity or elastic deformation; does not include chemical energy or nuclear energy. |
| Machine | A device that helps do work by changing the magnitude and/ or direction of an applied force. |
| Fulcrum | The point of which a lever pivots. |
| Mechanical Advantage | A number that tells how many times a machine multiplies input force. |
| Wheel and Axle | A simple machine consisting of two circular objects of different sizes; the wheel is the larger of the two circular objects, and the axle is attached to the center of the wheel. |
| Mechanical Efficiency | A quantity, usually expressed as a percentage, that measures the ratio of work output to work input a machine |
| Pulley | A simple machine that consists of a wheel over which a rope, chain, or wire passes. |
| Lever | A simple machine that consists of a bar that pivots at a fixed point called a fulcrum. |
| Inclined Plane | A simple machine that is straight, slanted surface, which facilitates the raising of loads; a ramp. |
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