A 5.5 meter long string has a mass of `0.03.5 kg` . If the tension in the string is 77 N, the speed of a wave on the string is :

Options

A. `165 ms^(-1)`
B. `102 ms^(-1)`
C. `110 ms^(-1)`
D. `77 ms^(-1)`

Answer

C

Explanation

`m=(0.035)/(5.5) kg//m, T=77 N`
`v= sqrt((T)/(m))`
`= sqrt((77xx5.5)/(0.035))=110 m//s`