Let A and B be the points respectively above and below the earth's surface each at a distance equal to half the radius of the earth. If the acceleration due to gravity at these points be gA and gA respectively, then gB : gA is :

see full answer

21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!

An Intiative by Sri Chaitanya

1:1

9:8

8:9

zero

answer is B.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

gA=GM(R+R/2)2=4GM9R2=49ggB=g1−dR here d=R2;gB=g2 ∴gBgA=98

Watch 3-min video & get full concept clarity