A coin is placed on a horizontal platform which undergoes vertical simple harmonic motion of angular frequency $\omega $. The amplitude of oscillation is gradually increased. The coin will leave contact with the platform for the first time
  • A
    at the mean position of the platform
  • Bfor an amplitude of $\frac{g}{\omega ^2}$
  • Cfor an amplitude of $\frac{g^2}{\omega ^2}$
  • D
    at the highest position of the platform
AIIMS 2008,AIEEE 2006, Medium
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