A boy is holding one end of an inextensible cord supporting a block of mass m at its lower end From this block another block of

Question

A boy is holding one end of an inextensible cord supporting a block of mass m at its lower end From this block another block of mass Mis suspended with the help of a light spring of stiffness k The boy brings the assembly over a table and lowers it until the lower block touches the tabletop and then releases the cord How far will the upper block move before coming to an instantaneous rest first time

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