Three identical metal balls,each of radius r, | vedclass

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(D) The centre of mass of each individual ball is located at its geometric centre.Since the three balls are identical and their centres form an equila

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point of intersection of the medians

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(D) The centre of mass of each individual ball is located at its geometric centre.Since the three balls are identical and their centres form an equilateral triangle,the system is symmetric.The centre of mass of a system of particles is the weighted average of the positions of the individual centres of mass.For three identical masses placed at the vertices of an equilateral triangle,the centre of mass coincides with the centroid of the triangle.The centroid of an equilateral triangle is the point of intersection of its medians.

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

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