n/(1/a1+1/a2+....+1/an)
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by using the formula we will calculat time period of simple harmonic motion
The advantage of harmonic mean is that it is used to solve situations in which there are extreme data values to true picture. The disadvantage of it is that it can be time consuming to evaluate the data.
A body undergoes simple harmonic motion if the acceleration of the particle is proportional to the displacement of the particle from the mean position and the acceleration is always directed towards that mean. Provided the amplitude is small, a swing is an example of simple harmonic motion.
The arithmetic mean, geometric mean and the harmonic mean are three example of averages.
The arithmetic mean is 140. The geometric mean is approx 138.56 and the harmonic mean is approx 137.14