A bar of cross section A is subjected to equal and opposite tensile force F at its ends. If there is a plane through the bar making an angle Q, with the plane at right angles to the bar in the figure
a) Find the tensile stress at this plane in terms of F, A and Q
b) What is the shearing stress at the plane in terms of F, and Q.
c) For what value of Q is tensile stress a maximum.