Physics Definitions Measurement

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Accuracy
Measurements have accuracy if systematic error is small
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Frame of Reference
Set of rulers and synchronised clocks used by observers in the frame to describe motion of an object
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Fundamental Units
Kg,m,s,K,mol,A. All other units are combinations of these called derived units
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Precision
Measurements have precision if random error is small
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Random Error
Error due to inexperience of observer and difficulty in reading instruments. Can be reduced by repeating measurements
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Scalar
A physical quantity with magnitude only
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Systematic Error
Error due to incorrectly calibrated instruments, same for all data points and cannot be reduced by repeating measurements
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Vector
A physical quantity with magnitude and direction
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Line of Best Fit
Curve or straight line that goes through all the error bars
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Other cards in this set

Card 2

Front

Set of rulers and synchronised clocks used by observers in the frame to describe motion of an object

Back

Frame of Reference

Card 3

Front

Kg,m,s,K,mol,A. All other units are combinations of these called derived units

Back

Preview of the back of card 3

Card 4

Front

Measurements have precision if random error is small

Back

Preview of the back of card 4

Card 5

Front

Error due to inexperience of observer and difficulty in reading instruments. Can be reduced by repeating measurements

Back

Preview of the back of card 5
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