Physics · 2019
JEE Main · 9 January 2019, Shift 2 · Q7
A rod of mass ' M ' and length ' 2 L ' is suspended at its middle by a wire. It exhibits torsional oscillations; If two masses each of 'm' are…
A rod of mass ' M ' and length ' $\displaystyle 2$ L ' is suspended at its middle by a wire. It exhibits torsional oscillations; If two masses each of 'm' are attached at distance 'L/$\displaystyle 2$' from its centre on both sides, it reduces the oscillation frequency by $\displaystyle 20$%. The value of ratio $\displaystyle \mathrm{m} / \mathrm{M}$ is close to :
Official answer
(4)
$\displaystyle 0.37$
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JEE Main 2019 Physics question, with the answer from NTA’s final answer key. Where our answers come from.