four-force


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four-force

[¦fȯr ¦fȯrs]
(relativity)
A four-vector equal to the product of the rest mass of a particle and the rate of change of its four-momentum with respect to its proper time.
References in periodicals archive ?
He added: "It is 99 per cent certain we will be involved in a four-force merger.
The four-force plan is also backed by the West Midlands Police Authority, but Diane Holl-Allen, who chairs the authority, said she has major concerns about the financing of the proposed changes.