Question

A pendulum oscillates 20 times in 5 seconds. Calculate its time period and frequency.

Answer 1

time period= no. of oscillation/time

=20/5

=4

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Answer 2

Answer:

The time period and frequency are 0.25 sec and 4 Hz.

Explanation:

Given that,

Number of oscillates n= 20

Time t = 5 sec

We need to calculate the time period

Using formula of time period

$T=\dfrac{t}{n}$

Where, t = time

n = number of oscillation

Put the value into the formula

$T=\dfrac{5}{20}$

$T=0.25\ sec$

We need to calculate the frequency

Using formula of frequency

$f=\dfrac{1}{T}$

$f=\dfrac{1}{0.25}$

$f=4\ Hz$

Hence, The time period and frequency are 0.25 sec and 4 Hz.