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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 |
Power | The rate at which work is done |
Energy | the ability to work |
Kinetic energy | Energy of motion |
Potential energy | The energy that an object has because of the position, condition, or chemical composition of the object |
Mechanical energy | 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 |
Mechanical advantage | A number that tells how many times a machine multiplies input force |
Mechanical efficiency | Percentage that measures the ratio of work output in a machine |
Lever | A simple machine that consists of a bar that pivots at a fixed point called a fulcrum |
Fulcrum | |
Wheel and axle | A simple machine consisting of two circular objects of different sizes |
Pulley | |
Inclined plane |