### What is the relationship between buoyant force and weight in air when submerged in water?

There's no relationship between the weight of an object in air and the buoyant force on it when it's in water. The buoyant force is equal to the weight of the water the object displaces, which depends directly on its volume. Two objects that have identical weight in air will experience radically different buoyant forces in water if their volumes are different.

### What is the size of the buoyant force acting on an object?

The buoyant force is equal to the weight of the water displaced. Buoyant force = [density of water] x [volume displaced] x [gravity] Imagine you had a box of water that is itself under water. The forces would of course be balanced. This means that whatever the force of gravity would be on a box of water that size, that's what the buoyant force must be.

### This force acts upwards on objects suspended in water or air what is it?

It is called buoyant force. It is calculated by determining the volume of water displaced by the object, which is the volume of the object under water.The weight of this quantity of water is the buoyant force. It can also be calculated by knowing the depth of the object in the water, the pressure at that depth, and the area of the bottom of the object. Buoyant Force = Pressure * depth It can also…

### Does buoyant force depend on the density of the object?

No, it depends on volume of water displaced, density has nothing to do with it. Think of it like this: if that object wasn't there, wherever it is would be filled with water. Thus, the force on it depends on how much water it pushed out of the way. As much water as it pushed away is how much force the water, as a whole, is exerting on it. the reason denser objects displace more…

### Is the buoyant force of water on lead greater than that on iron?

That depends on the amounts, of course - what exactly you are comparing. The buoyant force depends on the volume. For a certain volume of lead, there will be the same buoyant force as for the same volume of iron. On the other hand, since lead has a greater density, the buoyant force on a certain amount of MASS of lead will be less, compared to iron, since the same mass of lead will use…

### Does the buoyant force on a submerged inflated balloon increase as it sinks?

No, it actually might decrease due to balloon being compressed by pressure. Floating objects are governed by Archimedes Principle which states that the weight of a floating object is equal to the water it displaces. A corollary of Archimedes Principle is that the buoyant force acting on an object is equal to the volume of water displaced. Therefore, when a balloon is compressed as it submerges it displaces less water and the buoyant force decreases…

### Will a rock gain or lose buoyant force as it sinks deeper in water?

the buoyant force will remain the same because the rock will displace the same amount of water volume at any depth. Theoretically, it will gain buoyancy as it sinks, because when an objects density matches the density of the water around it, and water becomes denser as it falls deeper, it will be neutrally buoyant or floating. But since a rock is always going to be more dense than water it would still sink.

### How much forces acting on a body when it is suspended in water?

Two forces on a body in calm water: -- Gravitational force, equal to the weight of the body (when it's in vacuum), directed down. -- Buoyant force, equal to the weight of the water that would occupy the volume of the body if the body were not there, directed up. If the body is actually "suspended" ... i.e. it will stay at any depth you place it, and will not rise or sink ...then it…

### What is a force helps a ship float?

Buoyant force = Density of the water * g * Volume of displaced water For the ship to float, the buoyant force must be equal to the weight of the ship. Density of the water * g * Volume of displaced water = m * g Density of the water * Volume of displaced water = m When you multiply the density of water by the volume of displaced water, you get the mass of…

### How do you derived formula of buoyant force?

well it's easy..:D we consider a cylindrical portion of a liquid and find that on an average the object(water itself) remains stationary. This gives us an idea that the upward force(buoyant force) equals the gravitational force. Therefore the buoyant force in this case is the "mg" itself but in fluids we talk in terms of the volume and density so it is V(rho)g. Plus this buoyant force in any case is independent of the object…