(adsbygoogle = window.adsbygoogle || []).push({}); Conservation of energy ???

1. The problem statement, all variables and given/known data

I was trying to solve this question

" A mass M , attached to a horizontal spring , executes SHM with Amplitude A1 , when the mass M passes through its mean position then a smaller mass m is placed over it and both of them move together with Amplitude A2 , ratio of A1/A2 "

when i apply conservation of Momentum i get

(M/(m+M))^(1/2)

and if i apply conservation of energy

i get (M/(m+M)

Can somebody help me figure out what is going wrong ?

Thank you

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# Conservation of energy ?

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