So, w 1 is positive, but w 1 is less than w. We will see that in the next theory; it is explained better, but at the present moment, w is the Velocity of the disc, and what is w 1? Please look at this diagram, this diagram. We have got the w as the disc velocity omega, and we have said from 0, the water Velocity increases to omega one and far down is omega 2. What is the relationship between omega and omega one? Can the water have an incremental velocity equal to the disc velocity? The answer is no.