In case of a flat belt drive with \(T\) as the maximum permissible tension, \(v\) as linear speed of belt, \(w\) as weight per metre length of belt, the maximum permissible speed is given by

(a) \(T=w v^{2} / g\)

(b) \(T=2 w v^{2} / g\)

(c) \(T=3 w v^{2} / 2 g\)

(d) \(T=3 \sqrt{ } w v^{2} / 2 g\).