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InterviewSolution
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A spring balance A reads 2 kg with a block of mass m suspended from it. Another balance B reads 3 kg when a beaker with a liquid is put on its pan. The two balances are now so arranged that the hanging mass m is fully immersed inside the liquid in the beaker as shown in the figure given below.In this situation,(a) the balance A will read 2 kg and B will read 5 kg(b) the balance A will read 2 kg and B will read 3 kg(c) the balance A will read less than 2 kg and B will read between 3 kg and 5 kg(d) the balance A will read less than 2 kg and B will read 3 kg |
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Answer» Answer is : (c) the balance A will read less than 2 kg and B will read between 3 kg and 5 kg When block is dipped in water, it displaces some water which exerts buoyant force on block. As a result, reading on scale A will be lower than 2 kg. Due to reaction of block (which is equal to buoyant force), beaker of water is pushed. So, reading of scale B will be more than 3 kg. |
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