AIPMT PRELIMS 2010 Physics Center of Mass MCQ Question
Two particles which are initially at rest, move towards each other under the action of their internal attraction. If their speeds are v and 2v at any instant, then the speed of centre of mass of the system will be
v
2v
Zero
1.5v
Correct Answer
Detailed Explanation
The speed of the center of mass of a system of particles is determined by the external forces acting on the system. Since there are no external forces, the speed of the center of mass remains zero.
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