Physics · 2026
JEE Main · 22 January 2026, Shift 1 · Q31
A solid sphere of mass 5 kg and radius 10 cm is kept in contact with another solid sphere of mass 10 kg and radius 20 cm. The moment of inertia of…
A solid sphere of mass $\displaystyle 5$ kg and radius $\displaystyle 10$ cm is kept in contact with another solid sphere of mass $\displaystyle 10$ kg and radius $\displaystyle 20$ cm. The moment of inertia of this pair of spheres about the tangent passing through the point of contact is $\displaystyle \_\_\_\_$ $\displaystyle \mathrm{kg} . \mathrm{m}^2$.
Official answer
From NTA’s final answer key for this paper.
(2)
$\displaystyle 0.63$
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JEE Main 2026 Physics question, with the answer from NTA’s final answer key. Where our answers come from.