So, you you know supposing I pushed it down, then the particle curve push down, but
here I am rotating it remember like a cylinder. So, I am rotating it there may be some
surface stresses they are very small which we are neglecting, but the net pushing of water
is just not there, it is now you know you can say that I made a made a cutting in the
water and the thing is going, that is why the roll damping is very low, there is no roll
damping. Therefore, if roll damping that is b roll is very low, you do not expect any I
mean like this this sort of, in a resonance a lower motion it is very high.