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Question

The moment of inertia of a uniform rod of mass 0.50 kg and length 1 m is 0.10 kg-m2 about a line perpendicular to the rod. Find the distance of this line from the middle point of the rod.

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Solution

Length of the rod = 1 m, Mass of the rod = 0.5 kg Let at a distance d from the centre the rod is moving. Applying parallel axis theorem, the moment of inertia about the point

(ml212)+md2=0.10

0.5×l212+0.5×d2=0.10

112+d2=0.2

d2=0.118

d=0.342m from the centre


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