Question bank/JEE Main/Physics

A disc has mass 30 kg and radius 1m. The moment of inertia in
kgm^2about a tangent to its rim in itsplane is 7.5n. Find the value on
n.

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Moment of inertia of a disc about its diameter is
$I_{d} = \frac{1}{4}{MR}^{2}$
Now, according to perpendicular axis theorem moment of inertia of disc
about a tangent passingthrough rim and in the plane of disc is
$$= = 37.5$$

Source: Grass-G / P-07 Physics paper 17 October.docx