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Chapter 9
Chapter
Term | Definition |
---|---|
motion | the state in which one object's distance from another is changing |
reference point | A place or object used for comparison to discribe the position or motion of a person or object |
distance | the leght of a path between two points |
displacement | the lrngth and direction of a straight line between starting and ending points |
vector | a measurable quantity that consists of both a magnitude and a direction |
speed | the distance an object travels in certain period of time without regard to direction |
average speed | the overall rate of speed at which an object moves; calculated by dividing the total distance an object travels by the total time |
instantaneous speed | the speed of an object at any given instant |
velocity | speed in a given direction |
slope | the steepness of a line on a graph |
acceleration | the rate at which velocity with time |
work | aword that describes what is done an object when a force is exerted on an object that causes it to move |
energy | the ability to do work or cause change |
kinetic enrgy | energy that an object has due to its motion |
potential energy | stored energy that results from position or shap of an object |
gravitational potential energy | potential energy related to an object's height |
elastic potenial energy | the energy of stretched or compressed objects |
mechanical energy | an object's combined kinetic energy and potential energy |
law of conseration of energy | the rule that energy canont be created or destroyed |