Oscillations

JEE Main level, single correct, medium

67 of 194

Question 67 of 194

A coin is placed on a horizontal platform which undergoes vertical simple harmonic motion of angular frequency ω\omega. The amplitude of oscillation is gradually increased. The coin will leave contact with the platform for the first time

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Answer: (C) for an amplitude of gω2\frac{\mathrm{g}}{\omega^2}

Aω2=gA \omega^2=g
⇒A=g/ω2\Rightarrow A=g / \omega^2

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