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Practice question

MCQ

Question

A tank has a hole 1.4m below the water surface, open to the atmosphere. What is the efflux speed? (Take g\=9.8m/s2)

Options

Choose one · Correct answer highlighted

Explanation

Torricelli’s law: v = 2gh. g = 9.8m/s2, h = 1.4m. v = 2×9.8×1.4 = 27.44≈5.24m/s. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 5.2 m/s. This satisfies dimensional consistency and physical conditions given, so option C is scientifically correct.

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