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Why do we need to know the centre of mass of an object? For which objects, its position may differ from that of the centre of gravity? Use g = 10 m s-2, unless, otherwise stated. |
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Answer» 1. Centre of mass of an object allows us to apply Newton’s laws of motion to finite objects (objects of measurable size) by considering these objects as point objects. 2. For objects in non-uniform gravitational field or whose size is comparable to that of the Earth (size at least few thousand km), the position of centre of mass will differ than that of centre of gravity. |
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