If you look at the water line, if this was a flat plate, you will not get any wave making resistance, because the slope of the water line here is zero the water comes straight and goes past when I am putting something here like this, certainly the water cannot go past here anymore, so it has to go like this therefore, there is a pressure point, the pressure point is coming primarily because of the generation of water line slope that is, gradient of the water line do you understand this?