See, we are going to continue our t

See, we are going to continue our talk on the dynamic equations of motion. Actually, Last lecture we ended up getting this newton equation in this way, I will add those extra terms later on. See this well of course, the equation if I the origin at center of Gravity but, if my origin what located at some other distance and typically if I thought. r G to be X G 0 0. Because, normally you would always choose body coordinate at a distance with X G. Normally, the center of gravity is on the center line and origin also you will put on the canter line just X will be so. If just to not 0 X then the extra terms that comes out are. that is why I left it free you see etcetera. So, this is what was my newton’s equation of motion that is what it says that is all essentially, this this is what it says but, now as I was mentioning today, which going to be a rather important from the maneuvering point of view see now I need to figure out a way to represent the fluid forces that is these forces, X Y N are the fluid forces coming on the hull remember and all the forces external forces to which it is excited.