CIVIL TUTOR

6.1 Centre of gravity: The point at which whole weight of the body is assumed to be concentrated, is known as the centre of gravity of that body. 6.2 Centroid: The point at which whole area of a plane(circle, rectangle, triangle, quadrilateral etc) is assumed to be concentrated is known as the centroid of that area. It is represented by C.G or simply G. •  The centroid and centre of gravity lie at the same point. 6.3  C.G of simple plane figures: C.G of a uniform rod lies at it's middle point C.G of a rectangle or a parallelogram lies at a point where it's both the diagonals meet.  C.G of a triangle lies at a point at which the three medians of the triangle meet. C.G of a circle lies at the centre of the circle. 6.4 Centroid of plane areas by Method of Moments: Consider a plane area with a total area "A" whose C.G is to be determined.  Let's divide this area into a nu...