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Two small balls A and B are made of same material, A is solid but B is hollow. These are connected by an ideal spring and this system is kept over a smooth plank such that center of mass of two balls coincide with mid point of the plank. Initially the spring is compressed by a certain amount and the plank is in horizontal position. Now we release the system then,

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Solution

Verified by Toppr

in the question only it is given that center of mass of body are coinciding with mid point of plank,therefore with respect to the condition of equilibrium,these bodies will be at constant point only.

plank will not rotate

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