Question

A body vibrates 100 times in 20 seconds. Calculate the time period of the
vibrating body​

Answer 1

Answer:

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(i) Frequency of vibration is defined as number of vibration per second ,

so , frequency , f=number of vibrations/time in second =7200/60=120Hz ,

(ii) Now given , v=360m/s and f=120Hz

by , v=fλ ,

or λ=v/f=360/120=3m

Answer 2

Answer:

True

Explanation:

The number of vibrations completed in one second is called its frequency.

∴ As the body is vibrating 20 times in 1 s its frequency is 20 Hz.