A weight w is suspended from the mid-point of a rope, whose ends are at the same level. In order to make the rope perfectly horizontal, the force applied to each of its ends must be
A) less than w
B) equal to w
C) equal to 2w
D) infinitely large
Correct Answer:
D
Solution :
For equilibrium of body \[10m/s\] \[7m/s\] \[12m/s\] For the string to be horizontal, \[\frac{2v(n-1)}{n}\] \[\frac{v(n-1)}{n}\] \[\frac{v(n+1)}{n}\] \[\frac{2v(n+1)}{n}\] \[F=q(v\times B)\]