محمد أحمد حسن
10-11-2007, 12:54 AM
a smooth string of length 60 cm . is tied from its ends to two points A,B in the same horizontal plane where AB = 36cm . asmooth ring of weight 120 gm.wt is threaded to the string , and is left freely till it comes to rest. prove in the position of equilibrium of the ring that the two parts of the string are equal , and find the tension in each string