Define the term centre of gravity of a body?

Explanation

**Step-by-Step Solution:**

1. **Definition of Center of Gravity**: The center of gravity of a body is defined as the point at which the entire weight of the body can be considered to act. It is the average location of the weight distribution of the object.

2. **Calculation of Center of Gravity**: To calculate the center of gravity, you take the sum of the moments of all the weight components of the object about a reference point (origin) and divide that by the total weight of the object.

- **Moment**: The moment is calculated as the product of the weight of a component and its distance from the reference point.

...