Geotechnical Engineering

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N-GEO\APPENDIX.PM5 902

902 GEOTECHNICAL ENGINEERING


The base and other units of the S.I. System are tabulated below:

Quantity Unit Symbol Remarks

I Base Units:
Length metre m
Mass kilogram kg
Time second s
Electric Current ampere A
Thermodynamic temperature kelvin K Celsius scale may be used for
practical purposes.
Luminous intensity candela cd
Amount of substance mole mol

II Supplementary Units :
plane angle radian rad
solid angle steradian sr Solid angle subtended at the
cente of a sphere by a surface
area equal to the square of the
radius.

III Derived Units
Force newton N Force which produces an
acceleration of 1 m/s^2 acting on
a mass of 1 kg. Also, 1 kg = g N
Energy joule J Work done by a force of 1 N
over a displacement of 1 m or
1 J = 1 Nm
Power watt W Rate of work of 1 J/s
Flux weber Wb
Flux density tesla T
Frequency hertz Hz Hz = 1 c/s (sā€“1)
Electric conductance siemens S
Pressure, stress pascal Pa 1 Pa = 1 N/m^2
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