physics: the legal principle archimedes

In everyday life, we will find that the objects inserted into the fluid such as water, for example, has a smaller weight than when the objects are not in the fluid. you may be hard to lift a stone from the ground but the same stone easily lifted from the bottom of the pool. This is because the buoyancy force as previously described. Buoyant force is due to the difference in fluid pressure at different depths. fluid pressure increases with depth. The more the fluid (liquid), the greater the pressure of the fluid. When an object is inserted into the fluid, there is a pressure differential between the fluid in the upper body and the fluid at the bottom of the object. Fluid located on the bottom of the object has a greater pressure than the fluid at the top of the object.

In the picture above, it looks an object floating in the water. Fluid is beneath the object has a greater pressure than the fluid which is located at the top of the object. This is caused by fluid under the object has a depth greater than the fluid above the object (h2> h1).

The amount of fluid pressure on kedalamana h2 is:

The amount of fluid pressure on kedalamana h1 is:

F2 = the force exerted by the fluid on the bottom of the body, F1 = force exerted by the fluid on the upper body, A = surface area of the object The difference between F2 and F1 is the total force is given by the fluid on the body, which we are familiar with the term buoyancy. The magnitude of the buoyant force is:

Description:

Because

(The density equation)

So the equation that states the amount of buoyant force (Fapung) above we can write to:

mfg = WF = weight of the fluid that has the same volume as the volume of the submerged object. Based on the above equation, we can say that the buoyant force on an object equals the weight of the fluid it displaces. Remember that what is meant by the displaced fluid here is a volume of fluid equal to the volume of the object immersed in a fluid. In the picture above, we use illustrations in which all parts of the body immersed in a fluid (water). Otherwise indicated in the picture it will look as follows:

If the objects are inserted into the fluid, floating, in which the object is only partially submerged, the volume of fluid displaced = volume of the submerged part of the object in the fluid. No matter how the shape of the object and the object, it will experience the same thing. This is the work of Archimedes who is now passed on to us and is better known by the nickname "Archimedes Principle". Archimedes principle states that:

When an object wholly or partially immersed in a liquid, the liquid will provide an upward force (buoyant force) on the object, where the magnitude of the upward force (buoyant force) equal to the weight of the liquid displaced.

Archimedes principle can prove yourself by doing the following small experiment. Put water into a container until it overflows Keep that bucket filled completely full of water. After that, please enter an object into the water. Once the objects inserted into the water, then some water will spill. The volume of water spilled = volume of object submerged in water. If all parts of the body submerged in water, the volume of water spilled = volume of the object. But if the object is only partially submerged, the volume of water spilled = volume of the object submerged in water amount of buoyancy provided by the water on the object = weight of water spilled (heavy water spilled = w = mairg = density of water x volume water spilled x acceleration of gravity). The volume of water spilled = volume of object submerged in water.