Two force are equal and opposite in direction exerted on a bar (rod) as shown in figure. Hence plane PQ makes an angle theta with the cross-section 'a'. Find the tensile stress on PQ.

Two force are equal and opposite in direction exerted on a bar (rod) a

1.	Two force are equal and opposite in direction exerted on a bar (rod) as shown in figure. Hence plane PQ makes an angle theta with the cross-section 'a'. Find the tensile stress on PQ.
Answer» Solution :In `DELTA PRQ, (PR)/(PQ) = COS THETA, ` Area of PR =a `therefore (a)/(PQ) = cos theta` `therefore` Tensile STRESS `= (F.)/(PQ)=(F cos theta)/(a //cos theta) = (F cos ^(2) theta )/(a)`