What does it mean when it is said that " SI system is a coherent system of units" ?
Asked by nasir.mirza
27th September 2018,
12:59 PM
Answered by Expert
Answer:
The SI system is also called coherent system of units because of the following reasons:
- Coherent, literally means logical or reasonable.
- Majority of the SI units are derived from some fundamental units in a reasonable manner.
- For example,
1 Newton (SI unit of Force) = 1 Kg (SI unit of mass) x 1 m (SI unit of distance) / s2 (SI unit of time) , therefore 1 Newton is a coherent unit of Force.
Similarly for Power
1 Watt (SI unit of Power) = 1 Joules (SI unit of Energy) / 1 sec (SI unit of Time),
therefore 1 Watt is a coherent unit of Power.
- As the SI system of units represents or quantifies such physical quantities in a logical and derived manner, thery are said to be a coherent system of physical units.
Answered by Expert
27th September 2018,
5:16 PM
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