Question

the time period of a pendulum is 4 sec. Find its length (g=10m/s)​

Answer 1

Explanation:

HEY MATE........

Given: The pendulum takes 4sec to swing in each direction, which means it swings in one side of the pendulum for 4 sec.

$so \: half \: time \: period \: \frac{t}{2} = 4sec \\ \\ time \: period \: of \: simple \: pendulum \: t = 2 \times 4 = 8sec \\ \\ t = 2\pi \sqrt{ \frac{1}{g} } \\ \\ 8 = 2\pi \sqrt{ \frac{1}{10} } \\ \\ 1 = \frac{64 \times 10}{4 \times {\pi}^{2} } \\ \\ 1 = 15.9 |m|$

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