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Measurements and Experimentation — PHYSICS STD 9 — Question

ICSE BoardEnglish MediumSTD 9PHYSICSMeasurements and Experimentation3 Marks
Question
Explain the meaning of the derived unit with the help of one example?
✓

Answer

The units of quantities other than those measured in fundamental units can be obtained in terms of the fundamental units, and thus the units so obtained are called derived units.
Example:
Speed = Distance/time
Hence, the unit of speed = fundamental unit of distance/fundamental unit of time Or, the unit of speed = metre/second or $ms^{-1}$.
As the unit of speed is derived from the fundamental units of distance and time, it is a derived unit.

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