ya it is true...
as we go below d earth surface... d effective mass of earth dat exerts gravitational force will decrease and also d radius will decrease... hence v cannot use d formula g = GM / R^2 ...
rather d formula would be... g' = (GM / R^2).(1-h/R) = g(1-h/R)...
hope u got it...
rate if found useful...
Because inside the earth, the gravitational force is not exrted by whole mass of earth.
Suppose, an object is at depth 'd' from surface of earth, then only the sphrical mass having radius (R-d) will exert gravitational force on the object.
At depth d, the formula changes as,
Preparing for JEE?
Kickstart your preparation with new improved study material - Books & Online Test Series for JEE 2014/ 2015
@ INR 4,950/-
For Quick Info
Find Posts by Topics