Like the gram and the kilogram, the tonne gave acceleration to a (now obsolete) force assemblage of the aforementioned name, the tonne-force, agnate to about 9.8 kilonewtons: a assemblage aswell generally alleged artlessly "tonne" or "metric ton" after anecdotic it as a assemblage of force. In adverse to the tonne as a accumulation unit, the tonne-force or metric ton-force is not adequate for use with SI, partly because it is not an exact assorted of the SI assemblage of force, the newton.
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