From point x= v2 so it is obvious that it will move towards origin. example: at an instant shown, three point masses m, 2m and 3m, rest on a horizontal surface

from point x= v2 so it is obvious that it will move towards origin. Example: At an instant shown, three point masses m, 2m and 3m, rest on a horizontal surface and are at the vertices of an equilateral triangle of unit side length. Assuming that G is the gravitational constant, the magnitude and direction of the torque on the mass 3m, about the point O, at that instant (l1T-JAM 2014) is