A bar of cross-section A is subjected to equal and opposite tensile forces F at its ends. Consider a plane through the bar making an angle theta with a plane at right angles to the bar. (a) What is the tensile stress at this plane in terms of F, A and @ ? (b) What is the shearing stress at the plane, in terms of F, A and theta (c) For what value of thetais the tensile stress a maximum? (d) For what value of theta is the shearing stress a maximum?

A bar of cross-section A is subjected to equal and opposite tensile fo

1.	A bar of cross-section A is subjected to equal and opposite tensile forces F at its ends. Consider a plane through the bar making an angle theta with a plane at right angles to the bar. (a) What is the tensile stress at this plane in terms of F, A and @ ? (b) What is the shearing stress at the plane, in terms of F, A and theta (c) For what value of thetais the tensile stress a maximum? (d) For what value of theta is the shearing stress a maximum?
Answer» Answer :(a)`(F COS^(2) theta)/(A)(b) (F sin 2 theta)/(2A);(C) theta=0^(@);(d) theta=45^(@)`