A spherical ball of radius 1 10^-4 m and density 10^5 kg/m^3 falls freely under gravity through a distance h before entering a tank of water, If after entering in water the velocity of the ball does…

Question

A spherical ball of radius 1 10^-4 m and density 10^5 kg/m^3 falls freely under gravity through a distance h before entering a tank of water, If after entering in water the velocity of the ball does not change, then the value of h is approximately: (The coefficient of viscosity of water is 9.8 10^-6 N s/m^2 )

Accepted Answer

Correct answer: B. (b) V_T= 2 g9 R^2( _B- _L) ⇒V_T= 29 10 (10^-4 )^29.8 10^-6(10^5-10^3) ⇒V_T=224.5 when ball fall from height (h) V= 2 gh h= ( V^22 g )=2518 m

Solution

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