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23 Cards in this Set
- Front
- Back
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scientific method
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principles and procedures for the systematic pursuit or knowledge involving the recognition and formulation of a problem, the collection of data through observation and experiment, and the formulation and testing of hypotheses.
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Hypothesis
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An educated guess; a reasonable explination of an observation or experimental result that is not fully accepted as factual until tested over and over again be experiment.
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scientific attitude
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the scientific method inclined toward inquiry, integrity, and humility.
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Fact
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a statement about the world that competent observers who have made a series of observations agree on.
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Law
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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.
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Theory
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a synthesis of a large body of informationthat encompasses well-tested and verified hypotheses about certian aspects of the world
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Pseudoscience
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fake science that pretends to be real science.
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Inertia
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the property of things to resist changes in motion
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Newtons first law of motion (law of inertia)
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every object continues in a state of rest of uniform speed in a straight line inless acted on by a nonzero net force.
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force
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a push or pull
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Net Force
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the vector sum of forces that act on a object
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mechanical equilibrium
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the state of an object of syatem or system of objectsfor which there are no changes in motion.
according to newtons first law, if at rest, the state of rest persists. if moving the motion continues with out change. |
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Equilibruim rule
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for any object or system of object in equilibrium, the sum of the forces acting equals zero.
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speed
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how fast something moves; the distance traveled per unit of time
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instantaneous speed
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the speed at any instant.
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Average speed
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the total distance traveled divided by the time of travel
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velocity
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the speed of a object and specification of its direction of motion
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vector quantity
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quantity in physics that has both magnitudeand direction.
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scalar quantity
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quantity that can be described by magnitude without direction.
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acceleration
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the rate at which velocity changes with time; the change in velocity may be in magnitude or direction, or both
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free fall
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motion under the influence of gravity only.
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force
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any influence that can cause a object to be accelerated, measured in newtons (or in pounds, in the british system)
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friction
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the resistive force that opposes that motion of attempted motion of an object either past another object with which it is in contact of through a fluid.
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