Buoyancy



("Archimedes Principle") (The (The weight of the object displaces the same amount of weight of water)



"[|Buoyancy] is the upward force that keeps things floating. Buoyancy is not only based on it's weight but also the amount of water it displaces." ("Buoyancy") "When the object is removed, the volume that the object occupied will fill with fluid. This volume of fluid must be supported by the pressure of the surrounding liquid since a fluid can not support itself. When no object is present, the net upward force on this volume of fluid must equal to its weight, i.e. the weight of the fluid displaced. When the object is present, this same upward force will act on the object." ("Buoyant Force- Archimedes Principle")"This same idea helps to determine what will float in water and what will sink. If an object weighs more than the weight of the water it displaces, it will sink. If the object weighs less, it will float. This helps explain why a heavy ship can easily float in the water, while a much smaller and lighter brick will sink quickly. It isn't the size or shape of an object that primarily determines buoyancy , but the relation between an object's weight compared to the weight of the water the object displaces."(R) Is there a formula for buoyant force? Yes there is! **F= -pVg F(buoyant) -p=(density of the fluid) V=(volume of the object being submerged) G=(standard gravity on earth)** media type="custom" key="5128911" align="center"



"The idea of buoyancy was summed up by Archimedes, a Greek mathematician, in what is known as Archimedes Principle." Archimedes said//, "Any object, wholly or partly immersed in a fluid, is buoyed up by a force equal to the weight of the fluid displaced by the object."// ("Buoyancy") Archimedes is considered one of the greatest mathematicians of all time. He is also famed for his inventions and for the colorful—though unproven—ways he is believed to have made them. He is famous for the quote "Eureka!" (I've got it!) about his laying out the groundbreaking foundation of hydrostatics – how things float.



Yes, buoyancy can be positively buoyant, neutrally- buoyant and negaitively buoyant. "An object that floats in the water is known as being positively buoyant. An object that sinks to the bottom is negatively buoyant, while an object that hovers at the same level in the water is neutrally-buoyant." ("Buoyancy") "Buoyancy is important in a surprising number of fields. Designers and engineers must design boats, ships and seaplanes in a way that ensures that they remain afloat. In the case of submarines, experts developed ways to make them sink and bring them back to the surface. Many objects were developed with  buoyancy  in mind, such as life preservers and pontoons.  Buoyancy  affects many more things than most people imagine. Additionally,  buoyancy  is very important in a number of water-related sports. Many swimmers know that there are easy ways to float at the surface, such as laying on a person's back or holding a full breath.  Buoyancy  becomes noticeable when a swimmer tries to dive to the bottom of the pool, which can take effort. Scuba divers work with many  buoyancy  issues, as divers must know how to float, hover and sink in the water. In fact, scuba divers often wear extra lead weights to counteract the positive  buoyancy  of their bodies and gear." (R)



("Buoyancy")



"The buoyant force acts in the direction opposite to the force of gravity, so it makes an object feel lighter. If the weight of an object is equal to the buoyant force, no net force acts on teh object, and the object will not sink. If an object's weight is greater then the buoyant force, a net force will act on the object. A submerged object whose weight is equal to the buoyant force also has no net force acting on it. Since buoyant force equals the weight of the displaced fluid, the buoyant force will increase if more fluid is displaced." (Jones 83-84) "When an object is floating, the net force on it will be zero. This happens when the volume of the object submerged displaces an amount of liquid whose weight is equal to the weight of the object. A ship made of steel can float because it can displace more water than it weighs." ("Buoyant Force- Archimedes Principle") ("Buoyancy") (This object shows how buoyancy and gravity are related!)