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Chapter 9: Center of Gravity and Centroid Chapter Objectives • To discuss the concept of the center of gravity, center of mass, and the centroid. Department of Mechanical Engineering. ENGR 0135. Chapter 5 –3 These tables are helpful when the centroid of a composite Problem 5-80: Centroid? M.I. of plane lamina & different engineering sections. Page 2. 2. CENTRE OF GRAVITY. The point, through which the whole When density of a body is uniform throughout, centroid and CM coincide Reduce the problem to one of locating the centroid of area. Engineering mechanics solved problems pdf 143 5.9 Divide the object in the manner that the centroid be expressed . . easily in terms of the selected 3 types of mechanics problem involving dry friction. - Equilibrium. - Impending motion at all points. - Impending motion at some points Textbook: Hibbeler R. C., Engineering Mechanics, Statics , 14th ed, 2015 To show how to solve rigid-body equilibrium problems using the equations ofThe axis BB' passes through the area centroid and is called a centroidal axis. Products of Inertia: for problems involving unsymmetrical cross-sections.