How does the weight of an object in water compare to weight in air?

However, since air is less dense than water, the bouyant force of air is less than that of water, so the object in air seems heavier.

What is the weight of an object when it is floating in water?

An object will float if the buoyancy force exerted on it by the fluid balances its weight, i.e. if FB=mg F B = mg . But the Archimedes principle states that the buoyant force is the weight of the fluid displaced. So, for a floating object on a liquid, the weight of the displaced liquid is the weight of the object.

What is the formula of density and relative density?

Relative density can be calculated directly by measuring the density of a sample and dividing it by the (known) density of the reference substance. The density of the sample is simply its mass divided by its volume.

What is weight of an object in air?

Answer: This is called “buoyancy.” If the object weighs less than the displaced water, it floats. If it weighs more, it sinks but still weighs less under water than in the air.

Why is the weight in water always lower than the weight in air?

Because the density of air is very low (in the neighborhood of milligrams per milliliter), the buoyant force in air is very slight. In water, which has a density near 1 gram per milliliter, the magnitude of the buoyant force is much higher, so the ball’s weight is lower (though its mass is the same).

Why does the difference between the weight of the object in the air and its weight in water equal the weight of the displaced water?

If an object’s average density is less than that of the surrounding fluid, it will float. The reason is that the fluid, having a higher density, contains more mass and hence more weight in the same volume. The buoyant force, which equals the weight of the fluid displaced, is thus greater than the weight of the object.

How do you calculate the weight of a floating object?

Simply find the buoyancy force for the entire object (in other words, use its entire volume as Vs), then find the force of gravity pushing it down with the equation G = (mass of object)(9.81 meters/second2). If the force of buoyancy is greater than the force of gravity, the object will float.