Question

When a piece of wood is suspended from the hook of a spring balance, it reads 70 gf. The wood is now lowered into water. What reading do you expect on the scale of spring balance?
[Hint: The piece of wood will float on water and while floating, apparent weight = 0].

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Answer

The piece of the wood will float on water and while floating, apparent weight is zero. Hence, the reading on the scale of spring balance will be zero.

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