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A wooden block with a coin placed on its...

A wooden block with a coin placed on its top, floats in water as shown in figure . The distance L and H are shown in the figure .after sometime the coin falls into the water , then

A

L decreases

B

h decreases

C

L increases

D

h increases

Text Solution

Verified by Experts

The correct Answer is:
a,b
When a body floats on liquid ,then upward force is balanced by its weight acting downward.
When the coin falls into water ,weight of the (block +coin)system decreases and upward force also decreases .
If L decreases , upward force also decreases , hence L decreases . (Option A)
As l decreases volume of water decreases , hence h decreases . (Option B)
Note : When coin falls in water it is displaced by a volume of water which is very small so it cannot be taken into consideration .
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