Question

Calculate the time period of a
pendulum which completes 20 oscillations in 18 sec.​

Answer 1

Answer:

Time period = time taken / no.of oscillations

Explanation:

= time taken / no of oscillations

=18/20

=9/10 is the time period

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Answer 2

to find the answer we have to learn formula that number of oscillation / time

= 20/18 = 1.111

so time taken for 1 oscillation is 1.111