Question

Good morning
A pendulum oscillates 20 times in 4 seconds. Find its time period.
Sound chapter. Grade 8

Answer 1

$\large\sf\underline{Given:-}$

• $\sf\:Number\:of\:oscillations\:=20\:times$

• $\sf\:Time=4\:seconds$

$\large\sf\underline{To\:find:-}$

• $\sf\:Time\:Period$

$\large\sf\underline{Solution :-}$

We know,

Formula for Time period -

$\tt\red{\:\frac{Time}{Number\:of\:oscillations\: in\:time}}$

$\sf↦\:\frac{4}{20}$

$\sf↦\:\frac{1}{5}$

$\tt\purple{↦\:Time\:period=\:0.2\:sec}$

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• Thnku :)