The bar has a cross-sectional area A, length L, modulus of elasticity E, and coefficient o...

The bar has a cross-sectional area A, length L, modulus of elasticity E, and coefficient of thermal expansion a1. Ihe temperature of the bar changes uniformly along its length from T A at A to TB at B so that at any point x along the bar T = TA + x(TB - TA )/L. Determine the force the bar exerts on the rigid walls. Initially no axial force is in the bar and the bar has a temperature of TA.