A boy timed 30 oscillations of a certain pendulum thrice and obtained 1min. 10s, 1min....

JAMB 1991

A boy timed 30 oscillations of a certain pendulum thrice and obtained 1min. 10s, 1min. 12s and 1min. 7s respectively.The mean period of oscillation of the pendulum is

A. 0.14s
B. 0.43s
C. 2.32s
D. 6.97s

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Correct Answer: Option C

Explanation

Total time = (3 x 60) + 29
= 209sec

period \(\frac{t}{n}\) = \(\frac{209}{90}\)

= 2.32sec

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A boy timed 30 oscillations of a certain pendulum thrice and obtained 1min. 10s, 1min....

Correct Answer: Option C

Explanation

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