Question

1. If a 1 m long pendulum has a time period of 2 s, what should be the length of a pendulum of time
period 4 s?
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Answer 1

If a 1m pendulum has a time period of 2s , what should be the length of a pendulum of time period 4s

solution : we know, time period of simple pendulum, T = 2π√(l/g), where l is length of pendulum, g is acceleration due to gravity and T is time period. hence, length of the pendulum must be 4m.