Question

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 highest position of the platform
• B. At the mean position of the platform
• C. For an amplitude of $\frac{g}{{\omega }^2}$
• D. For an amplitude of $\frac{g^2}{{\omega }^2}$

Answer 1

Answer: (A), (C)

The correct options are
A At the highest position of the platform
C For an amplitude of $\frac{g}{{\omega }^2}$