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45 Cards in this Set
- Front
- Back
Physics |
branch of science that involves the study of the physical world. |
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scientific method |
patterns of logical approaches to a problem |
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hypothesis |
testable explanation for a problem using what you know and have observed |
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control |
is the standard by which the experimental results can be compared |
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independent variable |
the factor that is not allowed to change |
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dependent variable |
the factors whose outcome depends on the independent variable |
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model |
a representation of an idea, event, structure, or an object that helps people better understand it |
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scientific theory |
an explanation of things on events based on knowledge gained from many observations |
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scientific law |
a statement about what happens in nature and seems to be true |
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SI |
dometric system |
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dimensional analysis |
method of treating the units as algebraic quantities that can be cancelled |
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significant figures |
digits in a measurement |
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parallax |
the difference in a parent direction of an object as seen from 2 different points on a straight line |
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measurement |
is a comparison between an unknown quality and a standard. |
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precision |
the degree of exactness of a measurement |
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accuracy |
closeness of a measurement |
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motion diagram |
series of images showing positions of moving object taken at regular time intervals |
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particle model |
a simplified version of a motion diagram in which the moving object is replaced by a series of single points |
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dimension |
measure in one direction |
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coordinate system |
a system used to describe motion that gives the zero point location of the variable being studied. |
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origin |
the point at which both variables in a coordinate system have the value zero |
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position |
the distance and direction from the origin to an object |
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distance |
the entire length of an objects path even if the object moves in many directions |
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magnitude |
a measure of size |
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vector |
quantity that has both magnitude and direction |
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scalar |
quantity that is just a number without any direction |
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time interval |
difference between 2 times |
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displacement |
a change in position |
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resultant |
a vector that represents the sum of 2 other vectors |
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intersection |
place were 2 or more things meet or cross |
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position time graph |
graph that can be used to determine an objects velocity and position |
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absolute value |
non negative number equal in numerical value to a given real number |
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average velocity |
ratio of the change of position to the time interval |
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average speed |
distance traveled divided by the time taken to travel the distance |
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instantaneous velocity |
a measure of motion that tells the speed and direction of an object at a specific instant |
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acceleration |
is the change in velocity divided by the interval of time which the change occurs. |
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instaneous acceleration |
change in an objects velocity at a specific instant |
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free fall |
the motion of an object body when air resistance is negligible |
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free fall acceleration |
the acceleration of an object due to the effect of gravity |
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deceleration |
negative acceleration |
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mechanics |
study of motion |
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uniform motion |
motion where equal displacements occur during successful, equal time intervals |
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frame of reference |
a set of criteria or stated values in relation to which measurements or judgements can be made |
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veloctiy time graph |
a graph that has velocity plotted on the vertical axis |
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average acceleration |
the change in an objects velocity during a measurable time interval divided by that specific time interval |