Physics
Grade-9
Easy
Question
The length of the string of a pendulum is 100 cm, and the pendulum takes 42 s to complete 20 oscillations. What will be its time period?
- 2.1 s
- 4.2 s
- 1.2 s
- 2.4 s
Hint:
Time period of a pendulum is the time taken by it to complete one oscillation.
The correct answer is: 2.1 s
Numbers of oscillations = 42
Time taken = 20
Time period of a pendulum is the time taken by it to complete one oscillation.
So, time period of the given pendulum =
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