Question

Why do we need to know the centre of mass of an objects? For which objects its position may differ from that of the centre of gravity?

Answer 1

Answer:

Explanation:

In most mechanics problems the gravitational field is assumed to be uniform. The center of gravity is then in exactly the same position as the center of mass. The terms center of gravity and center of mass tend to often be used interchangeably since they are often at the same location.

Answer 2

Explanation:

• All the objects and masses have a certain point at which the direction of weight is equal on all sides that is the direction of force due to weight experience that that point is equal from all sides and has no connection with the gravity.
• All objects also have a point where the distribution of weight is is equal in all directions known as centre of gravity.
• Hence mostly these two points that is centre of mass and centre of gravity are at the same point hence used interchangeably.  
• These points would differ only when the gravitational pull is not constant.

To know more:

Why do we need to know the centre of mass of an objects? For which objects its position may differ from that of the centre of gravity?

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