NEET 2015 Physics Center of Mass MCQ Question
Two spherical bodies of mass M and 5M and radii R and 2R are released in free space with initial separation between their centres equal to 12R. If they attract each other due to gravitational force only, then the distance covered by the smaller body before collision is
2.5 R
4.5 R
7.5 R
1.5 R
Correct Answer
Detailed Explanation
The center of mass of the system remains constant. The smaller body moves towards the center of mass, covering a distance proportional to its mass ratio, which is 2.5 R.
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