91Ó°ÊÓ

The time period of oscillation is 0.75 sec.

The time period is the time required to complete one complete cycle. We use this concept to find the time period. Once we know the time period, we can find the frequency and angular frequency by using the basic formula in SHM.

Formula:

The time period of a body in oscillation

$\mathrm{T}=\frac{1}{\mathrm{f}}$ (i)

Angular frequency of a body in oscillation

$\mathrm{Ó\neg }=2×\mathrm{Ï€}×\mathrm{f}$ (ii)

Time taken to complete one cycle isthetime period that is the time taken for repeatingthemotion.

So, the time period is $\mathrm{T}=0.75\sec$.

Using equation (i), the frequency of a body is given as

$\begin{array}{rcl}\mathrm{f}& =& \frac{1}{\mathrm{T}}\\ & =& \frac{1}{0.75}\\ & =& 1.3\mathrm{Hz}\end{array}$

Hence, the value of frequency is $1.3\mathrm{Hz}$.

Using equation (ii), the angular frequency is given as

$\begin{array}{rcl}\mathrm{Ó\neg }& =& 2\mathrm{Ï€}×1.3\\ & =& 8.17\mathrm{rad}/\sec \end{array}$

Hence, the value of angular frequency is $8.17\mathrm{rad}/\sec$.