Physics - Mechanical Properties of Solids Question with Solution | TestHub

The bar shown in the figure is made of a single piece of material. It is fixed at one end and consists of two segments of equal length $\frac{L}{2}$ 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 joint to remain circular, Y is young's modulus].