Pye_End
Well-known member
No - it is not about pressure - it is about relative density.
You could discuss and resolve the forces if you wish - but I think there is a danger when talking about pressure that you think it is water pressure, which increases with depth. Depth is irrelevant and has no part in this thread.
The force exerted upward by the water on the floating body is g. Anything more and it will be accelerating upward, and anything less it will be sinking.
Buoyancy has its place, but is really a factor of relative density - buoyancy is the force exerted for example by a submerged float - a buoyancy aid of 100 newtons will exert a force of 100 newtons upwards when fully submerged. This is due to the relative density of the float compared with the fluid. It will continue to accelerate upward until no further force is experienced (ignoring friction) - ie when enough of it is out of the water so there is neutral buoyancy - ie it is floating.
The volume of water that it displaces or the water pressure have no bearing on whether it will float or sink.
You could discuss and resolve the forces if you wish - but I think there is a danger when talking about pressure that you think it is water pressure, which increases with depth. Depth is irrelevant and has no part in this thread.
The force exerted upward by the water on the floating body is g. Anything more and it will be accelerating upward, and anything less it will be sinking.
Buoyancy has its place, but is really a factor of relative density - buoyancy is the force exerted for example by a submerged float - a buoyancy aid of 100 newtons will exert a force of 100 newtons upwards when fully submerged. This is due to the relative density of the float compared with the fluid. It will continue to accelerate upward until no further force is experienced (ignoring friction) - ie when enough of it is out of the water so there is neutral buoyancy - ie it is floating.
The volume of water that it displaces or the water pressure have no bearing on whether it will float or sink.