A coin is placed on a horizontal platform AB which undergoes SHM about mean point O in a vertical plane. The coin does not slip on the platform. The force of friction acting on the coin is F. Then

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F is directed towards A when the coin tends to move away from A and away from B when the coin tends to move towards (2)

F is always directed towards one end of platform

F is minimum when the coin and the platform come to rest momentarily at the one extreme position of SHM

F is maximum when the coin and the platform come to rest momentarily at the other extreme position of SHM

answer is B, C, D.

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