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Physics
Physics

science that deals with the study of matter and energy

science that deals with measurements
Measurement

Scientific method of comparing unknown quantity, capacity or dimension and a unit of
measurement or standard.
Systems of measurement
1.
Metric system
a.
MKS (meter, kilogram, second)
b.
CGS (cm, gram, second)
2.
English system
a.
FPS (foot, pound, second)
Quantity

anything that can be measured
Classification of quantity
1.
According to unit
a.
Fundamental quantity
i.
Length (m)
ii.
Mass (kg)
iii.
Time (s)
iv.
Temperature (
o
C)
v.
Electric charge (coul)
b.
Derived quantity
 a quantity obtained by combining two or more fundamental quantity
ex. N (kg.m/s
2
)
2.
According to physical characteristics
a.
Vector quantity
– quantity which has magnitude and direction and a unit of
measurement.
Ex. Velocity, acceleration, displacement, force
b.
Scalar quantity
– quantity which has only magnitude and a unit of
measurement.
Ex. Speed, distance, mass
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View Full DocumentSome conversion factors
1 in = 2.54 cm
1 cm = 10 mm
100 cm = 1m
1000 = 1 km
3.28 ft = 1m
1000 liters = 1 m
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 Spring '11
 Prof.CharlesLeiserson

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