Question #b36c5

1 Answer
Jun 15, 2015

Answer:

It all boils down to #E_g=m*g*h#
#m#=mass, #g#=gravitational acceleration, #h#=height.

Explanation:

If the height #h# is small enough in relation to the diameter of the earth, we may assume #g# to be constant at #g=9.8m//s^2#
(actually, #g# varies a tiny bit over the planet, second decimal)

Now we fill in what we know:
#E_g=m*g*h->#
#8.2*10^3=69*9.8*h->#
#h=8200/(69*9.8)~~12m#