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Assuming the earth tobe a sphere of unif...

Assuming the earth tobe a sphere of uniform mass density, how much would a body weigh half way down to the centre of the earth if it weighed 250N on the surface?

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The correct Answer is:
125N
`m = 250 // 9.8 kg, g. = g[1-(x //R ) ], x = R //2 , g. = g[1- (R//2R ) ] = g//2 = 4.9 ms^(-1)`. Weight `= mg. = ( 250 // 9.8 ) xx 4.9 = 125 N`
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