In a certain clock, a pendulum of length l1 has a period t1 = 0.95s. the length of the pendulum
is adjusted to a new value l2 such that t2 = 1.0 s. what is theratio l2/l1?

Ratio of length will be

Explanation:

We have given time period of the pendulum when length is is

And when length is time period

We know that time period is given by

So ----eqn 1

And -------eqn 2

Dividing eqn 2 by eqn 1

Squaring both side

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