Hey, I have something that has bugged me for a while regarding the solutions for the physics topic test gravity test 2 q8 solution... I am not getting the results provided in the solution when I plug them in my calculator so I am suspiscious that there may be an error made.... Finding Ep was fine, but when finding the velocity where it became an issue....
Hey Hey! I just did the calculations, and they worked for me, may I see your working so I can see the problem?
An important note here though is how to define potential energy, especially as if you should make the surface of the earth as 0, or the centre of the earth as 0. This tripped me up a tonne, but the primary rule of thumb that occurred to me was that if they say radius, they refer to the centre of the earth. If they say altitude, they refer to the surface
Nonetheless, this question is looking out for the change in potential energy. Maybe this will help in your new calculations