Question

In an arrangement four particles, each of mass 2 gram are situated at the coordinate points (3, 2, 0), (1, -1,0), (0, 0, 0) and (-1, 1, 0). The moment of inertia of this arrangement about the Z-axi will be -

Answer 1

Answer:

 0.034 kgm^2

Explanation:  The particle which is at origin(0,0,0) have negligible moment of inertia which is zero around z axis.Only other three particle will have moment of inertia around z axis.In the attached image I wrote resultant of two coordinates of three particles.