Homework Help: Physics

Posted by Rebecca on Thursday, September 30, 2010 at 8:28pm.

A large piece of wood, of mass 56 kg, falls over a waterfall and into the drop pool below. It enters the pool travelling at 12 ms-1 and is then subject to an upwards acceleration of 5.8 ms-2 due to its buoyancy. How long does it take before it bobs to the surface of the pool?

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