The document discusses the differences between centroid and center of gravity. The centroid is defined as a point about which the entire line, area or volume is assumed to be concentrated, and is related to the distribution of length, area and volume. The center of gravity is defined as the point about which the entire weight of an object is assumed to be concentrated, also known as the center of mass, and is related to the distribution of mass. Examples are provided to illustrate the concepts of centroid and center of gravity.

1. By: Jaimin Pandya
Centroid and Centre of Gravity

2. Centroid and Centre of Gravity
Centroid Center of Gravity
• It is defined as a point about
which the entire line, area or
volume is assumed to be
concentrated.
• It is related to distribution of
length, area and volume.
• It is defined as a point about
which the entire weight of the
body is assumed to be
concentrated.
• Center of mass.
• It is related to distribution of
mass.

3. Examples

4. Examples

5. Examples

6. Examples

7. Axis of Reference

8. Center of Gravity
 Consider system of n particles fixed within a region of space.
 The weights of the particles can be replaced by a single (equivalent)
resultant weight having defined point G of application

9. Center of Gravity

10. Center of mass

11. Center of Volume / Volume centroid

12. Center of Area / Area centroid

13. Center of Line / Line centroid

14. Axis of symmetry

15. Axis of symmetry