You have a hemisphere, like half a ping pong ball for example, sitting in a cup under a few centimeters of water. The hemisphere is sealed to the bottom so that no water can get underneath it. What is the buoyant force the hemisphere experiences?
P = P0 + ρgh
The Attempt at a Solution
So the hemisphere displaces water, which would lead me to believe that there would be an upward buoyant force on the object, but as I understand it force vectors due to pressure are always perpendicular to the surface, leading me to think there would be a net downward force. Which is it?