The linear density of a vibrating string is `1.3 xx 10^(-4) kg//m` A transverse wave is propagating on the string and is described by the equation `y= 0.021 sin (x + 30 t)` where x and y are measured in meter and t`t` in second the tension in the string is :-

Options

A. 0.12 N
B. 0.48 N
C. 1.20 N
D. 4.80 N

Answer

A

Explanation

`v=("coeff of" omega)/("coedd of"k)=(30)/(1)=30 m//s=sqrt((I)/(mu))`
`rArr T=muxx900=1.3xx10^(-4)xx900 =0.12 N`.