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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 moving away from mass B with acceleration ‘a’, then the acceleration of mass B will be:

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a
MFF+Ma
b
F+MaM
c
Ma-FM
d
F-MaM

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detailed solution

Correct option is D

For B MaB=F-kx

For A MaA=kx

Given that the difference in accelerations is a.

M(aA+aB)=F

aB=F-MaM

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