Question

Review

Two boys A and B are at a distance 1360 m apart. Boy-B clapped, at the same time boy-A released the bob of pendulum from its extreme point. Boy-A hears the clapping when bob reaches first time at its initial position. The time taken by pendulum to oscillate 45 times is [Take speed of sound = 340 m/s]

Answer 1

Explanation:

Time period of second's pendulum is 2s hence the time taken from one extreme to another is half of the time period.

$\frac{2}{2} = 1s$

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