A) 400 N
B) 80 N
C) 4 N
D) 4000 N
Correct Answer: B
Solution :
\[n=\frac{1}{2l}\sqrt{\left( \frac{T}{m} \right)}\] \[\therefore \] \[T={{(2nl)}^{2}}\times m\] \[={{\left( 2\times \frac{1}{4}\times 2 \right)}^{2}}\times 80=80N\]You need to login to perform this action.
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