Question

A pendulum makes 20 oscillation in 10 sec. calculate frequency

Answer 1

Answer:

To find the frequency we use the formula oscillation. The answer is calculated in Hz (heartz)

time

EXPLANATION:

According to the formula we will put values.

So,

oscillation => 20 => 2Hz

time 10

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Answer 2

Answer:

A pendulum makes 20 oscillations in 10 sec. Its frequency will be $2Hz$

Explanation:

• 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)

• In the question, it is given that,

        Number of oscillations   = $20$

        Time taken    $=10s$

        Then using equation(1),

         Frequency = $\frac{20}{10} =2 Hz$