dictionary help| force | medical dictionary |
<physics> Rate of change of momentum with time. Forces are said to cause accelerations via f = ma (Newton's law).
There are four primary forces known presently: the gravitational, electromagnetic, weak nuclear, and strong nuclear forces. The gravitational and electromagnetic forces are long-range (dropping as 1/distance^2), while the nuclear forces are short range (effective only within nuclei, distances on the order of 10^-15 metres). The electromagnetic force is much stronger than the gravitational force, but is generally cancelled over large distances because of the balance of positive and negative charges.
See: momentum.
(04 Apr 1998)
Forbes-Albright syndrome, Forbes' disease, Forbes, Gilbert, forbidden < Prev | Next > forced, forced alimentation, forced beat
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