A particle is executing SHM with angular frequency ω and amplitude A. At the instant shown, it is at point A and moving towards the mean position B. It takes time t to reach B. If the time period is T, the average speed between A and B is:

Question

G1 Physics · Accepted Answer

If the particle takes time t from point A to the mean, its instantaneous displacement from the mean at A is A sin(ωt). The distance travelled to the mean is therefore A sin(ωt), so average speed=A sin(ωt)/t. Correct answer: A.