1. The problem statement, all variables and given/known data a mass M , attached to a horizontal spring executes SHM(simple harmonic motion) 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 . the ratio A1/A2 is ...? 2. Relevant equations taking angular frequency = ω 3. The attempt at a solution first taking two mass and spring as the system, since there is no external force momentum remain conserved , applying (M)(ω1)(A1) = (M+m)(ω2)(A2) , i get correct answer but while applying energy conservation equations, i get an incorrect answer! will energy not remain conserved in such process? plz help!