A boy timed 30 oscillations of a certain pendulum thrice and obtained 1min. 10s, 1min.
PHYSICSJAMB 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
Correct Answer: C. 2.32s
Explanation
Total time = (3 x 60) + 29
= 209sec
period \(\frac{t}{n}\) = \(\frac{209}{90}\)
= 2.32sec
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