A hole is drilled half - way to the centre of the earth. A body weighs 200 N on the surface of the earth. How much will it weigh at the bottom of the hole ?

Options

A. 100 N
B. 150 N
C. 0
D. 250 N

Answer

a

Explanation

`d=(R)/(2)`
`therefore" "g'=g(1-(d)/(R))=(g)/(2)`
`therefore" "mg'=(mg)/(2)`
`=(200)/(2)=100N`