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Physics-

General

Easy

Question

Four similar point masses (each of mass m) are placed on the circumference of a disc of mass M and radius R. The M.I. of the system about the normal axis through the centre O will be:-

${M R}^{2}$ + 4 ${m R}^{2}$
$\frac{1}{2} {M R}^{2} + 4 {m R}^{2}$
${M R}^{2} + \frac{8}{5} {m R}^{2}$
None of these

The correct answer is: $fraction numerator 1 over denominator 2 end fraction M R to the power of 2 end exponent plus 4 m R to the power of 2 end exponent$

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