A wooden block, with a coin placed on its top, floats in water, as sho

1.	A wooden block, with a coin placed on its top, floats in water, as shown in the figure. The distances 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
Answer» Correct Answer is: (d) both l and h decrease When the coin slips into the water, the wooden block moves up and l decreases. When the coin was floating, it displaced water equal to its own weight. When inside the water, it displaces water equal to its own volume. As its density is greater than that of water, it displaced more water in the first case. Hence, h decreases when it falls into the water.

A wooden block, with a coin placed on its top, floats in water, as shown in the figure. The distances 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

Answer»

Correct Answer is: (d) both l and h decrease

When the coin slips into the water, the wooden block moves up and l decreases. When the coin was floating, it displaced water equal to its own weight. When inside the water, it displaces water equal to its own volume. As its density is greater than that of water, it displaced more water in the first case. Hence, h decreases when it falls into the water.

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A wooden block, with a coin placed on its top, floats in water, as shown in the figure. The distances 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

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