A simple pendulum has length 0.4 m. Taking m/s², what is its time period?
Answer and explanation
Correct answer: C. 0.4π s
- Step 1: The period is s. Answer: 0.4π s. Why not the others: 0.8π s: forgets to take the square root properly. 0.2π s: uses the wrong factor of 2. 0.4 s: drops π.
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