Final answer:
To calculate the deformation of point B on the aluminum rod, use the formula for deformation with the given values of force and Young's modulus.
Step-by-step explanation:
To determine the deformation of point B on the rod, we need to use the formula for deformation:
Deformation = (Force x Length) / (Young's modulus x Cross-sectional area)
Given that the force (P) is 90 kN, the Young's modulus (E) is 70 GPa, and assuming that the rod has a uniform cross-sectional area, we can calculate the deformation of point B.