Each point mass 2 kg is connected at the end of each uniform rod of length 1m and mass 1kg. All the masses are in XY plane. Find the moment of inertia of system about Z-axis (in kg-`m^2`).

Options

A. 7
B. `7//2`
C. 5
D. none of these

Answer

A

Explanation

`I=(3xx2xxl^(2))+((3xx1xxl^(2))/3) =7l^(2)=7xx(1)^(2) =7 kg-m^(2)`