Two point masses `m_(1)` and `m_(2)` are joined by a weightless rod of length `r`. Calculate the moment of inerrtia of the system about an axis passing through its centre of mass and perpendicular to the rod.

Explanation

`r_(1)=((m_(2))/(m_(1)+m_(2)))r`
`r_(2)=((m_(1))/(m_(1)+m_(2)))r`
`I_(c)=m_(1)r_(1)^(2)+m_(2)r_(2)^(2)`