A) 648 N
B) 724 N
C) 832 N
D) 980 N
Correct Answer: A
Solution :
Given that \[y=0.06\sin \left( \frac{2\pi x}{3} \right)\cos (120\,\pi t)\] This is comparing with \[y=2a\sin \left( \frac{2\pi x}{\lambda } \right)\cos \left( \frac{2\,\pi vt}{T} \right)\] we get \[\lambda =3\,m,\,\,v=60\,Hz\] Now \[v=v\lambda \] \[=60\times 3\] = 180 m/s Now \[v=\sqrt{\left( \frac{T}{\mu } \right)}\] \[180=\sqrt{\left( \frac{T}{\mu } \right)}\] \[T=-180\times 180\times \mu \] \[=180\times 180\times \frac{m}{l}\] \[=180\times 180\times \frac{3\times {{10}^{-2}}}{1.5}\] = 648 NYou need to login to perform this action.
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