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CGP EDU Academic Team
Published on: September 12, 2026
A cork is submerged in water by a spring attached to the bottom of a pail. When the pail is kept in a elevator moving with an acceleration downwards, the spring length
Text Solution
Verified by ExpertsThe correct answer is:
B
Density of cork = d, Density of water = ρ ρ
Resultant upward force on cork \(= \sqrt{(\rho - d) g}\)
This causes elongation in the spring. When the lift moves down with acceleration a, the resultant upward force on cork \(= \sqrt{(\rho - d)(\bar{g} - a)}\) which is less than the previous value. So the elongation decreases.
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