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A rocket is fired from the earth toward ...

A rocket is fired from the earth toward the sun. At what distance from the earth's centre is the gravitational force on the rocket is zero . Mass of the sun=` 2xx10^30` kg , mass of earth =`6xx10^24 `kg. Orbita radius= `1.5 xx 10^11` m. Neglect the effect of other planets etc.

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`g=GM/R^2`
When diameter is doubled ,radius .Hence,weight becomes one fourth.
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  13. Discuss the variation of g (ii) with depth below the earth's surface.

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