The bar shown in the figure is made of a single piece of material. It is fixed at one end. It consists of two segments of equal length L0/2 but different cross-sectional area A and 2A. What is the change in length of the entire system under the action of an axial force F. Consider the shape of **** to remain circular. (Given : y is young' modulus).
(A) 3FL/4Ay
(B) 3FL/8Ay
(C) 3FL/2Ay
(D) of these
