Question

Solve this question which is related to physics ​

Answer 1

$<font color ="blue">$ Halo

Formula of acceleration due to gravity at a height (h) is

g’ = g * [r / (r + h)]^2

0.2 = 9.8 * [r / (r + h)]^2

[r / (r + h)]^2 = 1/49

r / (r + h) = 1/7

7r = r + h

h = 6r

If radius of earth (r) is 6400km then Height (h) is 6 * 6400km = 38400 km