Thanks for your reply. Does that mean the normal force acting on the fluid due to the container(which is equal in magnitude to the weight of fluid) has to be ignored because it does not have any influence on the surface of the fluid?
I have been told by my teacher that the surface of a fluid is always perpendicular to the net force acting on it. The reason being a fluid can not withstand tangential stress and if a shear stress is applied to it, it will slip until the surface becomes perendicular to the net force. So my...