Physics · 2021
JEE Main · 17 March 2021, Shift 2 · Q5
Two identical blocks A and B each of mass m resting on the smooth horizontal floor are connected by a light spring of natural length L and spring…
Two identical blocks A and B each of mass m resting on the smooth horizontal floor are connected by a light spring of natural length L and spring constant K . A third block C of mass m moving with a speed $\displaystyle v$ along the line joining A and B collides with A. The maximum compression in the spring is

Official answer
(2)
$\displaystyle v \sqrt{\frac{\mathrm{~m}}{2 \mathrm{~K}}}$
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JEE Main 2021 Physics question, with the answer from NTA’s final answer key. Where our answers come from.