question_answer 28)

                  A rectangular frame is to be suspended symmetrically by two strings of equal length on two supports. It can be done in one of the following three ways:                                 The tension in the strings will be (a) the same in all cases. (b) least in (a) (c)    least in (b) (d) least in (c).                

Answer:

                  (c) \[T=\,\frac{mg}{2\,\sin \,\theta }\] and \[T=\,\frac{mg}{2}\] if \[\theta =\,{{90}^{o}}\]