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JEE Main 2024 (31 Jan, Shift 1) · Terminal Velocity

Terminal Velocity question from JEE Main 2024 (31 Jan, Shift 1)

Q24JEE Main 2024 · 31 JAN · SHIFT 1Easy

Terminal Velocity

A small steel ball is dropped into a long cylinder containing glycerine. Which one of the following is the correct representation of the velocity time graph for the transit of the ball?

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Answer: (b)

Net force $= W - U - 6\pi\eta r v$ decreases as $v$ increases, so acceleration falls from $g_{\text{eff}}$ to zero.
$v$ starts at zero, rises with decreasing slope and approaches the terminal velocity.
Only graph (b) shows this rising curve that levels off.
So the answer is (b).

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