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Two small masses m are fixed at the ends of a light rod of length l. I about a perpendicular axis through its centre?
A2ml^2
Bml^2
Cml^2/4
Dml^2/2
Answer & Solution
Correct answer: D. ml^2/2
Each mass is l/2 from the axis, so I = 2m(l/2)^2 = ml^2/2.
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