A Steel Plane Truss Is Loaded at B and C $\text { is } A = 3970 \mathrm {~mm} ^ { 2 }$

Multiple Choice

A steel plane truss is loaded at B and C by forces P =200 kN. The cross-sectional area of each member $\text { is } A = 3970 \mathrm {~mm} ^ { 2 }$ . Truss dimensions are H=3 m and L = 4 m. The maximum shear stress in bar AB is approx- imately:

A) $27 \mathrm { MPa }$
B) $33 \mathrm { MPa }$
C) $50 \mathrm { MPa }$
D) $69 \mathrm { MPa }$