Question

The bob of an oscillating pendulum passes through the mean position 400 times in 100 sec . The time period of the pendulum is ?​

Answer 1

so as per given situation

for 400 oscillations time required is 100 seconds

so for one oscillation time required is 0.25 seconds which is time period for one oscillation.

Answer 2

times the bob passes through the mean position in one time period is

2

total number of time periods in 100s = n = 400/2 = 200

( ful solutions in copy )

0.5 is your answer..