Numerical Problem 1:A mass hung from a spring vibrates 15 times in 12 s. Calculate (a) the frequency and (b) time period of the vibration.
Number of vibrations, n = 15
Time required, t = 12 s
Time period, T
Frequency, f = n/t, therefore, f = 15/12 = 1.25 Hz
Time period, T = t/n = 12/15 = 0.8 s