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Question

The condition, if the frictional force on block m2 is to act in the direction of its displacement from the mean position is met, what can be maximum amplitude of their oscillations?
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Solution

k1Am+μm2g=m1(k1+k2m1+m2)Am
Am(m1k1+m1k2m1+m2k1)=μm2g
or Am=μ(m1+m2)m2gm1k2m2k1

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