Question

A body is just floating in a liquid. If the body is slightly pressed down and released, it will _________.

• A. start oscillating
• B. sink to the bottom
• C. come back to the same position immediately
• D. come back to the same position stable

Answer 1

The correct option is B sink to the bottom

As body is just floating, its density is same as that of the liquid.

If pressed below, it will gain momentum downwards, and continue to sink till bottom.

When the body is slightly pressed, the contraction in volume decreases upthrust, so weight becomes greater than upthrust, body moves down. The upthrust further decreases, since more and more contraction occurs as the body moves down. The body thus, sinks to the bottom.