A wooden block with a coin placed on its top, float in water as shown in fig.10.3 The distance l and h are shown in the figure. After some time the coin falls into the water. then
A
l decreases.
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B
h decreases.
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C
l increases.
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D
h increases.
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Solution
The correct options are Al decreases. Bh decreases. As the block moves up with the fall of coil, l decreases, similarly h will also decrease because when the coin is in water, it displaces water equal to its own volume only.