is the pre-stressed force applied to tendon of a rectangular pre-stressed beam whose area of cross section is and sectional modulus is. The minimum stress on the beam subjected to a maximum bending moment is
A)f = (P/A) -(Z/M)
B)f = (A/P) -(M/Z)
C)f = (P/A) - (M/Z)
D)f = (P/A) - (M/6Z)

Question

Quizplus · Accepted Answer

The correct formula for the minimum stress on a beam subjected to a maximum bending moment, considering pre-stressing force (P), area of cross-section (A), maximum bending moment (M), and sectional modulus (Z), is $f = \frac{P}{A} - \frac{M}{Z}$. This accounts for both the uniform compressive stress due to the pre-stressing force and the bending stress due to the applied moment.

Is the Pre-Stressed Force Applied to Tendon of a Rectangular