9-1.Fluid Mechanics
medium

A wooden block, with a coin placed on its top, floats in water as shown in fig. the distance $l $ and $h$ are shown there. 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

(IIT-2002) (AIIMS-2014)

Solution

(d)As the block moves up with the fall of coin, $l $ decreases, similarly $ h $ will also decrease because when the coin is in water, it displaces water equal to its own volume only.

Standard 11
Physics

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