Assuming earth to be a sphere of uniform mass density, how much would a body wrigh galf way down the centre of rhe centre of the earth , if it weighed 100 N on the surface?

Answer

A, B

Explanation

Given , `mg =100 N rArr g'=g (1-(d)/(R))`
`d=(R)/(2) rArr (d)/(R)=(1)/(2)`
`:.g'= g= (1-(1)/(2))=(g)/(2)`
`:.mg'=(mg)/(2)=(100)/(2)=50 N`