Explain Archmidies Principle.
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Class 9th
Chapter - Gravitation
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Answer:
Archimedes Principle states that the buoyant force on a submerged object is equal to the weight of the fluid that is displaced by the object. Through the video, we can learn: 1. When a body is partly or completely immersed in water, it loses weight.
Explanation:
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Explanation:
Archimedes Principle
When we go swimming, we feel a little weightless in the water. The reason for this is that liquids exert an upward force to objects submerged in them. This is known as thrust and is a consequence of the difference in pressure a liquid exerts at different heights. As we submerge an object (considering it is fully submerged) deeper into a liquid, the pressure exerted by the liquid keeps on increasing, but the thrust force remains the same.
What is Archimedes Principle?
Archimedes’ principle states that:
“The upward buoyant force that is exerted on a body immersed in a fluid, whether partially or fully submerged, is equal to the weight of the fluid that the body displaces and acts in the upward direction at the center of mass of the displaced fluid”.
The value of thrust force is given by the Archimedes law which was discovered by Archimedes of Syracuse of Greece. When an object is partially or fully immersed in a liquid, the apparent loss of weight is equal to the weight of the liquid displaced by it.
Archimedes Principle
If you look at the figure, the weight due to gravity is opposed by the thrust provided by the fluid. The object inside the liquid only feels the total force acting on it as the weight. Because the actual gravitational force is decreased by the liquid’s upthrust, the object feels as though its weight is reduced. The apparent weight is thus given by:
Apparent weight= Weight of object (in the air) – Thrust force (buoyancy)
Archimedes’s principle tells us that this loss of weight is equal to the weight of liquid the object displaces. If the object has a volume of V, then it displaces a volume V of the liquid when it is fully submerged. If only a part of the volume is submerged, the object can only displace that much of liquid.
Archimedes Principle Formula
In simple form, the Archimedes law states that the buoyant force on an object is equal to the weight of the fluid displaced by the object.
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