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MHT CET 2024 (3 May, Shift 2) · Terminal Velocity

Terminal Velocity question from MHT CET 2024 (3 May, Shift 2)

Q22MHT CET 2024 · 3 MAY · SHIFT 2Easy

Terminal Velocity

A steel ball of radius 6 mm has a terminal speed of $12\text{ cms}^{-1}$ in a viscous liquid. What will be the terminal speed of a steel ball of radius 3 mm in the same liquid?

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Answer: (d)

Terminal speed $v \propto r^2$ for the same material and liquid.
$v_2 = 12\left(\frac{3}{6}\right)^2 = \frac{12}{4}$
$v_2 = 3\text{ cm s}^{-1}$
So the answer is (d) $3\text{ cms}^{-1}$ .

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