On the cross-section of a steel beam under bending, which one of the following statements is correct? (a) At the point where the maximum normal stress occurs, shear stress is always zero, while at the point where the maximum shear stress occurs, normal stress is not necessarily zero. (b) At the point where the maximum normal stress occurs, shear stress is not zero, while at the point where the maximum shear stress occurs, normal stress is always zero. (c) At the point where the maximum normal stress occurs, shear stress is always zero, and at the point where the maximum shear stress occurs, normal stress is also zero. (d) At the point where the maximum normal stress occurs, shear stress is not zero, and at the point where the maximum shear stress occurs, normal stress is also not zero.
On the cross-section of a steel beam under bending, which one of the following statements is correct?
(a) At the point where the maximum normal stress occurs, shear stress is always zero, while at the point where the maximum shear stress occurs, normal stress is not necessarily zero.
(b) At the point where the maximum normal stress occurs, shear stress is not zero, while at the point where the maximum shear stress occurs, normal stress is always zero.
(c) At the point where the maximum normal stress occurs, shear stress is always zero, and at the point where the maximum shear stress occurs, normal stress is also zero.
(d) At the point where the maximum normal stress occurs, shear stress is not zero, and at the point where the maximum shear stress occurs, normal stress is also not zero.
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