A simple pendulum takes 42 sec. to complete 20 oscillations. What is its time period?

AcademicPhysicsNCERTClass 7

Number of oscillations $=20$

Time taken $t=42\ s$

Frequency $f=\frac{number\ of\ oscillation}{time}$

$=\frac{20}{42\ s}$

So, the time period $T=\frac{1}{f}$


$=\frac{42}{20}\ s$

$=2.1\ s$

Therefore, the time period of the given simple pendulum is $2.1\ s$.

Updated on 10-Oct-2022 12:47:26