A simple pendulum has length 0.9 m. Taking m/s², what is its time period?

Answer and explanation

Correct answer: A. 0.6π s

  1. Step 1: The period is s. Answer: 0.6π s. Why not the others: 1.2π s: forgets to take the square root properly. 0.3π s: uses the wrong factor of 2. 0.6 s: drops π.

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