Which of the following system of units is not based on units of mass, length and time alone?
A. S.I.
B. M.K.SC. F.P.S
D. C.G.S
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A) S.I. System.................
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Answer:
force which produces unit acceleration in unit mass In SI, force is measured in newton (N).
Force is said to be I N, if it produces an acceleration of I ms-² in a body of mass 1 kg.
The C.G.S. unit of force is dyne. If m = 1 g;a = | cms-² : F= l dyne.
Hence, force applied is said to be 1 dyne if it produces an acceleration of 1 cms-² in a mass of 1g, 1 N = 10^-5 dyne.
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