Shown below is the cross-section of a bridge pier. Knowing that the cross-section is symmetric and that b = 3.2 m and d = 1.4 m, determine the moment of inertia about the X-X axis. Express your answer in mª to the nearest 0.001 mª. II b b/4 b/2 b/4 Y X- d/3 , d/3 , d/3| CI

PROBLEMS Introductory Problems 2/1 The force F has a magnitude of 500 N. Express F as a vector in terms of the unit vectors i and j. Identify the x and y scalar components of F. Ans. F = 383i - 321j N, F, = 383 N, F, 321 N %3D 40 F = 500 N

Calculate the moment applied at the end of a flat steel bar 1.2 m long that will produce a midpoint deflection of 40 mm. The flat bar is 75 mm wide and 9 mm thick. Use E = 200000 MPa. a. 404.5 N-mb. 202.5 N-mc. 303.5 N-md. 505.5 N-m

View Policies Current Attempt in Progress Replace the three forces shown by an equivalent force-couple system at point A. If the forces are replaced by a single resultant force, determine the distance d below point A to its line of action. 200 N Answers: R= 285 N i d = M = i Force-couple system at A. The force is positive if to the right, and the couple is positive if counterclockwise. Single resultant force. 150 N 690 mm 690 mm 690 mm N N-m mm