Physics-
General
Easy
Question
A ball of radius r and density r falls freely under gravity through a distance h before entering water. Velocity of ball does not change even on entering water. If viscosity of water is h, the value of h is given by
The correct answer is:
Velocity of ball when it strikes the water surface 
…(i)
Terminal velocity of ball inside the water 
…(ii)
Equating (i) and (ii) we get 
Þ 
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