Question: Consider the following process ( which may or may not be physically possible ) : An object of mass 7 M , initially at rest,

Consider the following process (which may or may not be physically possible): An object of mass 7M, initially at rest, has a coiled spring inside. The spring uncoils, breaking the object into two fragments, pushing them apart. After this explosion, we have
fragment 1: mass 3M, speed v to left
fragment 2: mass 4M, speed (3/4)v to the right
Assume that there are no external forces acting on this system.

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