00:01
For this given problem, first of all we draw a cartesian plane, a cartesian space, actually it should be x -axis horizontal, y -axis vertical, z -axis perpendicular to the plane of paper.
00:17
Two balls having same size, same mass at x -axis, and the two, a little bit smaller in magnitude, means having a lesser mass.
00:34
These are at the y axis and all the distances are same whether these are given as a and these are given as b but still all these distances are same and mass a little bit lesser this is small m this capital m okay, so whether the system is being rotated about x, x, axis, or about y axis, or about z axis, anywhere it may be rotated.
01:23
But the distance from the center for all of them, that is, distances of all the four spheres from the center, from the origin.
01:52
That is same because a is equal to b...