Question

A bob on the end of a spring is pulled and released.If the bob moves up and down 12 times in 3.6 seconds, determine the period and frequency of the oscillation. 

Answer 1

$T=\frac tn=\frac {3.6}{12}=0.3 ~s,$

$\nu=\frac 1T=\frac{1}{0.3}=3.3 ~Hz.$