Question

consider static fluid force. Think about a thin steel plate in the shape of an equilateral triangle. The triangle is submerged vertically in water. In your discussion post, respond to the following: How do you think the static fluid force acting on the surface changes (increase, decrease, same) in the following positions? Vertex up against the surface with opposite side parallel to the surface Side up against the surface Vertex up against the surface with the side perpendicular to the surface

How do you think the static fluid force acting on the surface changes (increase, decrease, same) in the following positions?

Vertex up against the surface with opposite side parallel to the surface

Side up against the surface

Vertex up against the surface with the side perpendicular to the surface

Answer 1

consider static fluid force only

for an equilateral triangle submerged into the liquid
if it is submerged horizontally or vertically, the opposite faces of the triangle handle equal and oppsoite hydrostatic pressure from both sides and hence the force on the triangle in bopth the xcases is 0

hence static force of the fluid does not change on a submerged equilateral triangle with change in orientation of the triangle in water

hence in any of the cases, if the triangle is submerged under water, net force on the triangle will be zero due to the equal hydrostatic pressure acting on both surfaces of the equilateral triangle causing net force due to hydrostatic pressure on the triabgle to be 0 in all cases