Question

at what height the acceleration debt gravity will be reduced to 36%of its value on the surface of the earth

Answer 1

since g is reduced to 36%

g' =0.36g ………(equation1)

**NOTE: IF QUESTION IS GIVEN g IS REDUCED TO 36% THEN USE g’=0.36g AND IF IT’S GIVEN g IS REDUCEDD BY 36% THEN USE g’=0.64g**

g’ = GM/(R+h)^2

GM= g*R^2

so g'=g*R^2/(R+h)^2 …...(equation.2)

by solving the above equations we have  

h= 2*R/3..

if u need u can calculate that.

hope it helps,