Question

If a pendulum completes 40 oscillations in 20 seconds, then, what is its frequency and time period?

Answer 1

oscillation=40 

time taken=20

in 1 sec = 40/20=2Hz  

frequency = 1/time period 

time period = 1/frequency 

time period = 1/2 =0.5 sec 

i hope it helps.........

Answer 2

Answer is 0.5 second .