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CBSE Class 9 Answered

Why is there no gravitational force at the centre of the earth?
Asked by | 20 Oct, 2009, 09:48: PM
Expert Answer

Assume an object is at the centre of a uniformly dense sphere. Matter surrounds the object in equal amounts in any direction. Hence the gravitational force of attraction from above and below cancels out. This is true of any other direction as well. Hence approximating the earth as uniformly dense sphere the gravitational force at it's centre turns out to be zero.

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Answered by | 04 Nov, 2009, 04:03: PM
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