How long must a simple pendulum be if it is to make exactly one swing per second? (That is, one complete oscillation takes exactly 2.0 seconds.)

The simple pendulum makes exactly one swing per second.

$\"\"$

One complete oscillation takes $\"\"$ .

Therefore, the time period is $\"\"$

Find the length of the pendulum.

The time period of the simple pendulum is $\"\"$ , where $\"\"$ is the length of the pendulum and $\"\"$ is acceleration due to gravity.

Substitute $\"\"$ and $\"\"$ in $\"\"$ .

$\"\"$

$\"\"$ .

The length of the pendulum is $\"\"$ .