I was at my sister's pool a few days ago and I noticed that when I took a
ball (a pool volleyball) and submersed it just below the surface and
released it, the ball would jump around 3 or 4 feel above the surface of
the water. When I pushed the ball deeper, about 2 or 3 feet below the
surface and let go, the ball would rise and then sort of sputter at the
surface and not rise above the surface at all. Does anyone know how to
explain this. I thought it would be a nice challenge for my students but
the problem is, I don't think I know what's going on either.
Thanks in advance.
Mike Barr
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