Parallelogram of Velocities


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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Parallelogram of Velocities

 

a geometric representation of the law of addition of velocities. For the case of a point in compound motion—that is, motion at a velocity vrel (relative velocity) with respect to a frame of reference moving at a velocity vveh (vehicle velocity) relative to a fixed frame of reference—the principle of the parallelogram of velocities states that the absolute velocity of the point is represented by the diagonal of a parallelogram whose sides are the vectors vrel and Vreh. The principle holds for velocities that are small by comparison with the velocity of light.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.