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A general hypothesis or statement about the relationship of natural quantities that has been tested over and over again and has not been contradicted. Also known as principle.
Law
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A synthesis of a large body of information that encompasses well tested and verified hypothesis about aspects of the natural world.
Theory
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Motion under the influences of the gravitational force only.
Free Fall
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A close agreement by competent observers of a series of observations of the same phenomena.
Fact
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An educated guess; a reasonable explanation of an observation or experimental results that is not fully accepted as factual until tested over and over again by experiment.
Hypothesis
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Speed at any instant of time
Instantaneous Speed
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A general hypothesis or statement about the relationship of natural quantities that has been tested over and over again and has not been contradicted. Also known as law.
Principle
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An orderly method for gaining, organizing, and applying new knowledge.
Scientific Method
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The time that has passed since the beginning of an event.
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Speed together with the direction of motion.
Velocity
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The rate at which velocity s changing. The change may be in magnitude, direction, or both.
Acceleration
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Path distance divided by time interval
Average Speed
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How fast something is moving; the path distance moved per time. The magnitude of the velocity vector.
Speed
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In physics, how fast something happens, or how much something changes per unit of time; a change in quantity divided by the time it takes for the change to occur.
Rate
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Regarded in relation to something else. Depends on the point of view, or frame of reference. Sometimes referred to as "with respect to"
relative
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