Physics · 2021
JEE Main · 26 February 2021, Shift 2 · Q10
Two masses A and B, each of mass M are fixed together by a massless spring. A force acts on the mass B as shown in figure. If the mass A starts…
Two masses $\displaystyle A$ and $\displaystyle B$, each of mass $\displaystyle M$ are fixed together by a massless spring. A force acts on the mass B as shown in figure. If the mass A starts moving away from mass B with acceleration ' a ', then the acceleration of mass B will be :

Official answer
(4)
$\displaystyle \frac{\mathrm{F}-\mathrm{Ma}}{\mathrm{M}}$
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JEE Main 2021 Physics question, with the answer from NTA’s final answer key. Where our answers come from.