Question

A simple pendulum makes 25 oscillations in 5 seconds. What is its frequency in Hz ? 
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Answer 1

Answer:

5 seconds pendulum makes = 15 oscillations In 1 ... per second ) is called its frequency ∴ Frequency = 10 Hz

Answer 2

Answer:

A simple pendulum makes 25 oscillations in 5 seconds. Its frequency in Hz is $5Hz$

Explanation:

• In the question, it is given that,

        Number of oscillations                   $=25$

        Time is taken for the oscillations   $=5s$

• The number of oscillations completed per time is the frequency of oscillation. It can be expressed as,  

        $Frequency = \frac{No\ of\ oscillations}{time\ taken}$

• Let f be the frequency of oscillation and N be the number of oscillations completed in time t.

         Now,

        $f = \frac{N}{t}$                            ...(1)

• Then using equation(1),

         Frequency = $\frac{25}{5} =5 Hz$