Physics · 2024
JEE Main · 8 April 2024, Shift 2 · Q35
A thin circular disc of mass M and radius R is rotating in a horizontal plane about an axis passing through its centre and perpendicular to its plane…
A thin circular disc of mass $\displaystyle M$ and radius $\displaystyle R$ is rotating in a horizontal plane about an axis passing through its centre and perpendicular to its plane with angular velocity $\displaystyle \omega$. If another disc of same dimensions but of mass $\displaystyle \mathrm{M} / 2$ is placed gently on the first disc co-axially, then the new angular velocity of the system is:
Official answer
From NTA’s final answer key for this paper.
(2)
$\displaystyle \frac{2}{3} \omega$
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JEE Main 2024 Physics question, with the answer from NTA’s final answer key. Where our answers come from.