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| English | Russian |
| center-of-mass velocity | скорость центра масс |
| kinetic energy is the product of mass by velocity squared, whereas momentum known as quantity of movement (motion) is the product of mass by speed | произведение (velocity) |
| mass-averaged velocity | среднемассовая скорость |
| mean mass velocity | средняя взвешенная по массам скорость |