Momentum and CollisionHard
Question
The moment of inertia of a rod about an axis through its centre and perpendicular to it is 
ML2 (where M is the mass and L, the length of the rod). The rod is bent in the middle so that the two halls make an angle of 60o. The moment of inertia of the bent rod about the same axis would be:
ML2 (where M is the mass and L, the length of the rod). The rod is bent in the middle so that the two halls make an angle of 60o. The moment of inertia of the bent rod about the same axis would be:Options
A.
ML2
ML2B.
ML2
ML2C.
ML2
ML2D.
Solution
We know that for a body, moment of inertia M.I = Σ Mr2
Now, bending of rod does not alter the distribution of individual particle, the body is made of, so the value of = Σ Mr2 will not change. Hence the changed moment of inertia of the body will be
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