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CBSE Class 9 Answered

What is Archimedes' Principal
Asked by HARMANDEEP SINGH | 11 Sep, 2010, 07:23: PM
answered-by-expert Expert Answer
When an object is immersed in water, it feels lighter. The principle that governs this behavior is known as Archimedes' Principle and is stated as:
 
"an object is immersed in a fluid is buoyed up (pushed up) by a force equal to the weight of the fluid displaced by the object. (and thus, net downward force it experiences is less, reducing its weight in liquid as compared to when placed in gas/air)."
 
The weight of the displaced fluid can be found mathematically. The fluid displaced has a weight W = mg = pfVg (pf - density of fluid)
The weight of object immersed in liquid, W = (pm - pf)Vg. (pm - density of body)


It is important to note that the buoyant force does not depend on the weight or shape of the submerged object, only on the weight of the displaced fluid.
Answered by | 11 Sep, 2010, 07:43: PM

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