Question:
The moment of inertia of a thin rod about an axis passing through its mid point and perpendicular to the rod is
2400 g cm^2. The length of the 400 g rod is nearly:    
(1) 8.5 cm 
(2) 17.5 cm
(3) 20.7 cm
(4) 72.0 cm 
 
                                         NEET -2024 
Solution:                
The moment of inertia of a thin rod about an axis passing through its mid point and perpendicular to the rod is 2400 g cm^2. The length of the 400 g rod is nearly:

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