composition-of-velocities law

composition-of-velocities law

[‚käm·pə′zish·ən əv və′läs·əd·ēz ‚lȯ]
(mechanics)
A law relating the velocities of an object in two references frames which are moving relative to each other with a specified velocity.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.