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Two balls of radii r and (r)/(2) are rel...

Two balls of radii r and `(r)/(2)` are released inside a deep water tank. Their initial accelerations are found to be `(g)/(2)` and `(g)/(4)` respectively. Find the velocity of smaller ball relative to the larger ball, a long time after the two balls are released. Coefficient of viscosity is given to be `eta`.

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