**Problem 8:** What should be the length of a simple pendulum whose time period is one second? What is its frequency?

**Solution**

Given data Time period of the pendulum, T = 1 s

Required Length of the pendulum, l =?

Formula

Put values,

To find the frequency of the pendulum, we know that, T = 1/f. Since T = 1 s, therefore, frequency is 1 cycle per second.

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