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Measurements and Experimentation — PHYSICS STD 9 — Question

ICSE BoardEnglish MediumSTD 9PHYSICSMeasurements and Experimentation2 Marks
Question
A simple pendulum completes $40$ oscillations in one minute. Find its (a) Frequency and (b) Time period.
✓

Answer

(a) Frequency = Oscillations per second
$=\left(\frac{40}{60}\right) s ^{-1} $
$=0.67 s ^{-1}$
(b) Time period $=1 /$ frequency
$=\left(\frac{1}{0.67}\right) s $
$=1.5 s$

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