Question
A wooden block, with a coin placed on its top, floats in water as shown in figure. The distance $$\ell $$ and $$h$$ are shown here. After some time the coin falls into the water. Then-
A wooden block, with a coin placed on its top, floats in water as shown in figure. The distance $$\ell $$ and $$h$$ are shown here. After some time the coin falls into the water. Then-
A.
$$\ell $$ decreases and $$h$$ increases
B.
$$\ell $$ increases and $$h$$ decreases
C.
both $$\ell $$ and $$h$$ increase
D.
both $$\ell $$ and $$h$$ decrease
Answer :
both $$\ell $$ and $$h$$ decrease
Solution :
$$\ell $$ decreases as the block moves up $$h$$ will also decreases because when the coin is in water it will displace a volume of water, equal to its own volume, whereas when it is on the block it displaces more volume than to own volume (because density of coin is greater than density of water).
$$\ell $$ decreases as the block moves up $$h$$ will also decreases because when the coin is in water it will displace a volume of water, equal to its own volume, whereas when it is on the block it displaces more volume than to own volume (because density of coin is greater than density of water).
