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The velocity of the centre of mass equals the total momentum divided by:

ATotal time
BTotal force
CTotal charge
DTotal mass
Answer & Solution
Correct answer: D. Total mass
1. Momentum of the system is written as P. 2. It is shared over the mass M of the whole system. 3. So the centre of mass velocity is P over M. _Source: syllabus Physics Part I, Chapter 7, Systems of Particles and Rotational Motion._
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