A uniform rod of cross-sectional area A and length L is subjected to an axial pull P. What is the change in length of the rod? (Assume that Young's modulus of elasticity E remains the same throughout the length)

Q: A uniform rod of cross-sectional area A and length L is subjected to an axial pull P. What is the change in length of the rod? (Assume that Young's modulus of elasticity E remains the same throughout the length)