Write the difference between centre of gravity and centre of mass of a body?
Write the difference between centre of gravity and centre of mass of a body?
If the distance between different body of the system is more than the dimension of the body then centre of mass is obtained but if the distance between different body of the system is less than the dimension of the body then centre of gravity is obtained.
In gravitationless space or in constant gravitational the centre of gravity and centre of mass of one same.
For finding centre of mass, gravitation is not need but for finding centre of gravity, gravitational is needed.
Another way for determining centre of gravity:
As shown in figure an irregular shape body is suspended from its different point. The vertical line through $A$ passes through the $CG$, it is mark as AA $_{1}$.
Then suspend the body through other point like $\mathrm{B}$ and $\mathrm{C}$ and obtain vertical line $\mathrm{BB}, \mathrm{CC}, \ldots$ The intersection of the vertical gives the centre of gravity $(CG)$.
If the body is small, by this method, centre of mass will be determined.
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