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17 Mar 2012 15:28:54 IST

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A cylindrical container of length L is full of a liquid which has mass density ?. It is pl

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A cylindrical container of length L is full of a liquid which has mass density ρ. It is placed on a weigh-scale; the scale reading is W. A ball which would float on the liquid if allowed to do so, of volume V and mass m is pushed gently down and held beneath the surface of the liquid with a rigid rod of negligible volume as shown.

What is the reading of the scale when the ball is fully immersed?

A) W+ρVg

B) W

C) W+mg-ρVg

D) None of these

Comments (4)

chanakya

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17 Mar 2012 17:02:33 IST

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since the ball can float on liquid, force of buoyancy acts equally all the areas so the weight remains unchanged.

chanakya

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17 Mar 2012 17:04:38 IST

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is it the right answer ?

Himsy

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24 Mar 2012 17:05:57 IST

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answer is correct but i didnt get your point. please explain.

KAREENA

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24 Mar 2012 17:20:16 IST

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AS THE BALL FLOATS , SO WEIGHT OF THE BALL = BUOYANT FORCE . SO THE TOTAL UPWARDS AND DOWNWARD FORCES ACTING ON THE CONTAINER REMAINS THE SAME OR UNCHANGED.

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