Question

State three conditions for a body to float or sink in a liquid.

Answer 1

Hint: When a body is immersed in a liquid, an upward force is exerted on the body. This upward force is responsible for the buoyancy of the body. And the water displaced is equal to the weight of the body.

Complete step by step answer:
According to Archimedes, the law of floatation suggests that the weight of the liquid displaced will be equal to the weight of the body. The water is displaced due to the buoyancy of the body. The liquid will exert an upward force on the body. This upward force is responsible for the body to come up in the liquid. It calls it a buoyant force.
This buoyant force will vary according to the density. The density and the buoyant force will determine the conditions for a body to float or sink in a liquid.
First one, if the buoyant force is equal to the weight of the body, then the body will float and it would be stationary. And if the density of the body is less than the density of the liquid, then the body will float.
Second one, if the buoyant force is less than the weight of the body, then the body will sink. And if the density of the body is greater than the density of liquid, then the body will sink.
Third one, if the buoyant force is greater than the weight of the body, the body moves up. And if the density of the body is equal to the density of the liquid then the body will suspend in the liquid.

Note: If the body floats in the liquid, the center of gravity of the body and the center of gravity of the displaced line will be in one vertical line. And the center of gravity of the displaced liquid will be the center of buoyancy.