A) 60 N
B) 40 N
C) 50 N
D) 30 N
Correct Answer: A
Solution :
The linear mass density is \[\mu =\frac{5\times {{10}^{-3}}kg}{5\sigma \times {{10}^{-2}}m}=10\times {{10}^{-2}}\text{kg}\,{{\text{m}}^{-1}}\] The wave speed is\[v=\sqrt{\frac{F}{\mu }}\] \[\Rightarrow \]Tension, \[T=\mu \,{{v}^{2}}\] \[={{(1.0\times {{10}^{-2}}kg\,{{m}^{-1}})}^{2}}\times 6400{{m}^{2}}{{s}^{-2}}\] Which is closer to 60 N.
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