So now, this thing is more easy to compute for 0 speed to, because what is happening? Now, lot of researches gone in, where oscillation of a 2 D section where done. Now, in fluid mechanics or hydrodynamics you might have learned that if I were to take a circle and find out oscillate this side, what is the added mass? Most I, this is supposed to be a pre requisite to your course. In marine hydrodynamics, you would have done the added
mass of that becomes exactly same as mass of the displaced water and in fact, at high frequency limit one can show that it becomes equal to mass of this.