I need basic info for Archimedes Principle of Buoyancy?

Question

Please give me the link.

Answer 1

The buoyant force on an object immersed in a fluid is equal to the force of gravity acting on the displaced fluid, which has a volume at most equal to the volume of the object, but an object also cannot displace water weighing more than itself.

Answer 2

Since you've already been provided with a few links, here's my dumbed-down explanation of the concept:

The buoyant force (or upthrust) on an object placed in a liquid will be equal to the weight of liquid it displaces.

An object that is less dense than a given liquid will displace a volume of liquid that is equal to the weight of the object. An object that is as dense, or more dense than a given liquid will displace a volume of liquid equal to the volume of the object.

Examples:

Floating ship - if you could measure the volume of water it displaces, the weight of that volume of water will be equal to the weight of the ship. As upthrust on the ship is equal to the weight of the ship, its apparent weight will be 0.

Fully immersed object (like a submarine) - its apparent weight will be it's weight in air minus the weight of water it displaces (i.e. the volume of the sub).

When a sub wants to surface it displaces the water in its ballast tanks with compressed air. This reduces the weight of the sub, making the total weight of water displaced by the sub greater than the weight of the sub. This produces upthrust that pushes the sub to the surface.

Hope that helps.

Answer 3

There will be upward thrust on the submerged object equal to the weight of liquid it displaced.

Answer 4

Good discussion, just what I was looking for.

Answer 5

here you go