A coin is placed on a horizontal platfor...

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

at the highest position of the platform

at the mean position of the platform

for an amplitude of `g//omega^(2)`

for an amplitude of `sqrt(g) //omega`

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a, c

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