Measurements and Experimentation — Question 9

As we know that, the time period of a seconds' pendulum is 2s.

So, time taken for a seconds’ pendulum to move from one extreme to other is equal to the half of time period.

$\text T_{\text {half}} = \dfrac{\text T}{2} \\[0.5em] \Rightarrow \text T_{\text {half}} = \dfrac{2}{2} = 1\ \text s \\[0.5em]$

Hence, time taken for a seconds' pendulum to move from one extreme to other extreme = 1s