23) A wooden block with a coin placed on its top floats in water as show in figure. The distance l and h are shown here. After some time this coin falls into water then.
(A) l decreases
(B) l increases
(C) h decreases
(D) h increases
Dear student,
After the coin falls off, less water will be displaced (the wood will float higher) and the level of the water displaced by the block will be lower. As the coin is denser than the wood, the water displaced by the coin is less than the water displaced by the weight of the coin when it was on top of the wood, so the overall height of the water ( h ) will also be lower.
So the answer is c.
Regards
After the coin falls off, less water will be displaced (the wood will float higher) and the level of the water displaced by the block will be lower. As the coin is denser than the wood, the water displaced by the coin is less than the water displaced by the weight of the coin when it was on top of the wood, so the overall height of the water ( h ) will also be lower.
So the answer is c.
Regards