Now, we will look at the non dimensional numbers based on these forces. So, first it comes to that is call 1 of the number, which is called the fraud number. It is basically if you look at the fraud number, basically it is the measure of the ratio of the inertia forces to that of the gravity force quality F i by F g, so that basically the inertia force force to the gravity force and you can say that this is nothing but u by root g l.