System of Particles and Rotational Motion - Result Question 66

73. In a rectangle $A B C D(B C=2 A B)$. The moment of inertia is minimum along axis through [1993]

(a) $B C$

(b) $B D$

(c) $HF$

(d) $E G$

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Answer:

Correct Answer: 73. (d)

Solution:

  1. (d) The M.I. is minimum about EG because mass distribution is at minimum distance from EG.

Among so many parallel axis, moment of inertia of the body is the minimum about on axis which is passing through the centre of mass of the body.