Question

A simple pendulum makes 20 oscillations in 5 sec. what is its time period also calculate frequency

Answer 1

Answer:

your answer is:-

Explanation:

no. of oscillations: - 20 in 5 sec  

TIME PERIOD= time taken/no. of oscillations =5/20= 0.25 secs

FREQUENCY=no. of oscillations/time taken=20/5= 4 hz.

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Answer 2

Answer:

The time period of the simple pendulum is $\frac{1}{4}$ sec and the frequency is 4Hz.

Explanation:

The time period (T) of a simple pendulum is defined as the time required to complete one oscillation.

From the question we have,

20 oscillations=5 sec

$1 oscillations=\frac{5}{20} =\frac{1}{4}$

$T=\frac{1}{4} sec$        (1)

And the frequency is defined as the inverse of the time period. i.e.

$f=\frac{1}{T}$       (2)

By using equation (1) in equation (2) we get;

$f=4Hz$    (3)

Hence, the time period of the simple pendulum is $\frac{1}{4}$ sec and the frequency is 4Hz.