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Four-force
In the
special theory of relativity
four-force
is a
four-vector
that replaces the classical
force
; the four-force of the four-vector
a
is defined as the change in
four-momentum
over the particle's own
time
:
<math>{dP_a \over d\tau}.</math>
See also:
four-vector
,
four-velocity
,
four-acceleration
,
four-momentum
.
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