Question

Q4- Calculate the frequency of a simple pendulum making 9000 oscillations in 1 min 30 seconds.
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Answer 1

Answer:

100Hz(times/sec)

Explanation:

oscillations= 9000

time== 1 min 30 sec = 90sec

frequency= no. of oscillations/ time

                 =9000/90

                 =100Hz(times/sec)

Therefore, frequency= 100Hz(times/sec)

Hope it helps you!

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Answer 2

First , let's define what is frequency for a simple pendulum following simple harmonic motion.

Frequency :

It is define as the number of oscillations the particle makes in one second. In other words, we can say that frequency is an index of the rapidity of oscillation.

Calculation:

Time is 1 min 30 sec = 60 + 30 = 90 secs.

In 90 sec , number of oscillations = 9000

$\therefore$ In 1 sec , number of oscillations = $\dfrac{9000}{90}$ = 100

So , as per our definition ,

$\boxed{\red{\huge{\bold{Frequency = 100 Hz}}}}$