Explanation
In S.H.M., at mean position i.e.. at x = 0 kinetic energy will be maximum and pE will be minimum. Total energy is always constant.
In simple harmonic motion, energy changes from kinetic to potential and potential to kinetic but the sum of two always remains constant.
Body collides elastically with walls of room. So, there will be no loss in its energy and it will remain colliding with walls of room after a regular time interval, so it’s motion will be periodic. Since acceleration is not proportional to displacement, so it’s motion is not S.H.M.
Time period is independent of mass of pendulum.
Minimum velocity is zero at the extreme positions. After Is it will be at extreme position.
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