A) 102 m/s
B) 77 m/s
C) 110 m/s
D) 150 m/s
Correct Answer: C
Solution :
The speed of transverse wave in a flexible string depends upon the tension in the string and the mass per unit length of the string. \[v=\sqrt{\frac{T}{m}}\] where T is tension and m is mass per unit length of the string (not the mass of the string). Given, \[m=\frac{0.035}{5.5}=\frac{7}{1100}\,kg/m,\] \[T=77\,N\] \[\therefore \] \[v=\sqrt{\frac{77\times 110}{7}}\] \[=110\,\,m/s\]
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