Question

A pendulum makes 20 oscillations in 40 seconds.what is the time period and frequency of its oscillations

Answer 1

Explanation:

It is given that,

Number of oscillations made by the simple pendulum, N = 20

Time taken, t = 40 seconds

Let T is the time period of its oscillation. The total number of oscillations per unit time is called frequency of the simple pendulum. It can be calculated as:

The relation between the time period and frequency is given by :

t = 2 seconds

Hence, this is the required solution.

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Answer 2

Answer:

Time period=t/N

                   =40/20

                   =2 s

Frequency=1/Time period

                 =1/2 Hz