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A bar of cross section A is subjected to...

A bar of cross section `A` is subjected to equal and opposite tensile force at its ends. Consider a plane section of the bar whose normal makes an angle `theta` with the axis of the bar.

a. What is the tensile stress on the plane?
b. What is the shearing stress on the this plane?
c. For what value of `theta` is the tensile stress maximum?
d. For what value of `theta` is the shearing stress maximum?

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