The shaft shown in the figure is machined from AISI 1040 CD steel. The shaft rotates at 1600 rpm and is supported in rolling bearings at A and B. The applied forces are F₁=1600 lbf and F2 = 640 lbf. A steady torque of 1600 lbf-in is being transmitted through the shaft between the points of application of the forces. A ↑ in- in in in -10 in -10 in F₁ F₁ in -8 in All fillets in R. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. -10 in All fillets in R. 10 in- Where is the critical section for this shaft? (You must provide an answer before moving to the next part.) F₁ F₂ in 1² in 7 3 in -8 in in- B ↑ 3 in -1+in T in B ↑

Any functioning component, such as machine parts, structural members, pressure vessels, and so on, are all under the influence of more than one force. When anybody is under the influence of more than one force such as shear forces, bending moments, axial…