A block of wood has a steel ball glued to one surface. The block can be floated
Question:
A block of wood has a steel ball glued to one surface. The block can be floated with the ball "high and dry" on its top surface.
(a) When the block is inverted, and the ball is immersed in water, does the volume of wood that is submerged increase, decrease, or stay the same?
(b) Choose the best explanation from among the following:
I. When the block is inverted the ball pulls it downward, causing more of the block to be submerged.
II. The same amount of mass is supported in either case, therefore the amount of the block that is submerged is the same.
III. When the block is inverted the ball experiences a buoyant force, which reduces the buoyant force that must be provided by the wood.
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