Home Physics Fluid Mechanics Mix A wooden block with a coin placed on its top…
Physics Fluid Mechanics Mix MCQ (Single Correct)

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 some time the coin falls into the water. Then

A
l decreases and h increases
B
l increases and h decreases
C
Both l and h increase
D
Both l and h decrease

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The correct answer is:
D

When the coin falls, the block moves upwards hence l decreases h will also decrease because

when the coin is in the water it will displace equal volume of water, whereas when it is on the block an equal weight of water is displaced.

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