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Re: buoyancy puzzle (long!)

Rick Tarara wrote:

Maybe I'm missing a subtle point, but the buoyancy force it due to the
difference in pressure between the top and bottom of the object. With the
two blocks glued, they become one object of weight W.

But the question asks about the force on the glue.
The only way this question makes sense is if the
system is not quite a single, rigid object.

Again: Thinking about infinities is a common cause
of confusion. Don't imagine the glue to be infinitely
firm -- that would pretty much preclude any sensible
analysis of the situation.