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NEET 1999 (AIPMT) · Centre of Mass of Discrete Particles

Centre of Mass of Discrete Particles question from NEET 1999 (AIPMT)

Q24NEET 1999 · AIPMTEasy

Centre of Mass of Discrete Particles

Three identical metal balls each of radius $r$ are placed touching each other on a horizontal surface such that an equilateral triangle is formed with centres of three balls joined. The centre of mass of the system is located at

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Answer: (d)

Each identical ball acts as an equal point mass at its centre.
Three equal masses at the vertices of a triangle have their CM at the centroid, where the medians meet.
So the answer is (d) point of intersection of the medians.

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