First slide
Fluid statics
Question

An object is made of a material of density 0.4 gm/cc. It is held 12 cm above the surface of water contained in a vessel and released. The depth it touches in water is :

Difficult
Solution

If the object is like a cube of height h and base area A

h A 0.4 g= ( h-12) A 1 g

 so    h-12= 8 cm

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