Question

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Do Question Number :- 5 and 6 in the attachment given ^

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Answer 1

Question 5 :

A pendulum oscillates 40 times in 4 sec. Find its time period and frequency.

Answer :

Given :

Total number of oscillations = 40

Time required = 4 seconds.

Time required to complete a oscillation = 4/40

= 1/10 or 0.1 second.

Time period => 0.1 second.

Now,

We know that :

Frequency = 1/ Time period

= 1/ 0.1 or 10 Hertz.

Frequency = 10 Htz.

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Question 2 :

The sound from a mosquito is produced when it vibrates it's wings at an average rate of 500 vibrations per sec. What is the time period of the vibration?

Answer :

Given :

Frequency = 500 vibration per seconds

Time required = Total time taken / Total number of oscillations

= 1/ 500

= 0.002 seconds

Hence, the time period of the vibration is 0.002 seconds.

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