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A pendulum oscillates 40 times in 4 seconds. Calculate its  (i) time-period, and 

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A pendulum oscillates 40 times in 4 seconds. Calculate its 

(i) time-period, and 

(ii) frequency. Can we hear the sound produced by the oscillations of this pendulum?

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1 Answer

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Best answer

Frequency = 40 vibration/ 4 seconds = 10 Hz 

Thus, time period = 1/f = 1/10 = 0.1 seconds. 

No, we cannot hear because the audible human range is from 20Hz to 20,000 Hz.

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