Question

potential energy - physics

Answer 1

how do you do b

Answer 2

you need the mass of the earth, its radius and the gravitational constant

Answer 3

Okay, let's begin by calculating the first energy we have, wich is gravitational.
We shall use this ecuation:
\[V(z)=mgh\]
where m is mass, g is gravitational acceleration and h the height.

Answer 4

i got 3 * 10^7 J for a
-6.22*10^9 for b
i dont know why is a nd b different

Answer 5

the difference is here: Our reference.