Question

If a simple pendulum completes 15 oscillations in 30 seconds, what is the time period of the simple pendulum

Answer 1

For 15 oscillation it takes 30 sec

For 1 oscillation time period it takes 30/15=2sec

Frequency=1/time period

Frequency=(1/2)sec^-1=0.5sec^-1

Answer 2

15/30 sec = 2 sec

frequency = 1/time period

frequency =(1/2)sec ^-1 =0.5sec^-1