Question

What reading do you expect on the scale of spring balance if a piece of wood lowered
into water? [ Consider density of given wooden piece < density of water]​

Answer 1

Answer:

When the wood is lowered into water, the wood will float in water.

So, its apparent weight = weight of the block in air − upthrust

Now, the piece of wood is floating implies that the upthrust is equal to the weight of the block in air.

Thus, the apparent weight of a floating body is zero. The spring balance will read zero.