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Chapter Nine
| Question | Answer |
|---|---|
| motion | the state in which one object's distance from another is changing |
| reference point | is a place or object used for comparison to determine if something is in motion |
| distance | is the length of a path between two points |
| displacement | is the length and direction that an object has moved from it starting point |
| vector | a quantity that consists of both a magnitude and a direction |
| speed | is the distance the object travels per unit of time S= D/T |
| average speed | divide the total distance traveled by the total time |
| instantaneous speed | is the rate at which an object is moving at a given instant in time |
| velocity | is speed in a given direction |
| slope | the steepness of a line on a graph...Slope= rise/run |
| acceleration | as the rate at which velocity changes with time. Acceleration= Final Velocity- Initial velocity/ Time |
| Work | is done when an object is caused to move a certain distance |
| energy | the ability to do work or cause change |
| Kinetic energy | energy of motion...KE= 1/2 x Mass x Speed squared |
| Potential energy | Stored energy that results from the position or shape of an object |
| Gravitational Potential Energy | potential energy release to an object's height GPE= Weight x Height |
| Mechanical energy | an object's combined kinetic energy and potential energy ME= KE + PE |
| Law of Conservation of energy | states when one form of energy is transformed to another no energy is created is destroyed |
| Elastic potential energy | the potential energy of objects that can be stretched or compressed. |
Created by:
gayledains
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