What is Centre of Gravity and Centroid of a Body?

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What is Centre of gravity

Centre of gravity of a body is defined as the point through which the whole weight of the body acts. A body can have only one centre of gravity for all positions of the body. It is represented or denoted by C.G. or G.

What is Centroid

The point, at which the total area of a plane figure (such as rectangle, triangle, square, quadrilateral, circle etc) is assumed to be concentrated, is called the centroid of that area. The centroid is also represented by C.G. or G.The centroid and centre of gravity are at the same point.

Centroid or centre of gravity of simple plane figures:

  • The C.G. of a uniform rod lies at its middle point.
 What is Centre of Gravity and Centroid of a Body?
  • The C.G. of a triangle lies at the point where all the three medians intersect each other.
 What is Centre of Gravity and Centroid of a Body?
  • The C.G. of a rectangle (or a parallelogram or a square) lies at the point where its diagonals intersect each other. It is also the point of intersection of the middle points of the opposite sides.
 What is Centre of Gravity and Centroid of a Body?
  • The C.G. of a circle lies at its centre.
 What is Centre of Gravity and Centroid of a Body?
For better understanding watch below videos

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Pankaj Mishra

Pankaj Mishra is a blogger by passion and Mechanical Engineer by profession. He has completed his B.Tech degree in mechanical engineering in the year 2015. He loves to share his knowledge and help others.

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