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Sahay Sir > Question Answers > Cengage NEET by C.P Singh > Part 1 > Chapter 13 - Simple Harmonic Motion > A coin is placed on a horizontal platform, which undergoes horizontal simple harmonic motion about a mean position O. The coin does not slip on the platform. The force of friction acting on the coin is F. (i) F is always directed towards O (ii) F is directed towards O when the coin is moving away from O, and away from O when the coin moves towards O (iii) F=0 when the coin and platform come to rest momentarily at the extreme position of the harmonic motion (iv) F is maximum when the coin and platform come to rest momentarily at the extreme position of the harmonic motion

A coin is placed on a horizontal platform, which undergoes horizontal simple harmonic motion about a mean position O. The coin does not slip on the platform. The force of friction acting on the coin is F. (i) F is always directed towards O (ii) F is directed towards O when the coin is moving away from O, and away from O when the coin moves towards O (iii) F=0 when the coin and platform come to rest momentarily at the extreme position of the harmonic motion (iv) F is maximum when the coin and platform come to rest momentarily at the extreme position of the harmonic motion

A coin is placed on a horizontal platform A person normally weighing 60kg stands on a platform which oscillates up and down simple harmonically with a frequency 2Hz and an amplitude 5cm. If a machine on the platform gives the person's weight As shown in figure a simple harmonic motion oscillator having identical four springs has time period