Suppose I had a tower that stood two Earth radii tall from the surface of the Earth to the top I start on the ground with a scal
e and big rock (I'm also a geology fan.) I weigh the rock and it's 90 lbs. Then I take the rock and the scale on an elevator and go up to the top of the tower. There I weigh the rock again. How much does the rock weigh up at the top of the tower.
No, weight has being proven to reduce by the further you move from the center of the Earth. But since even the tallest buildings in the world or tallest mountains are a tiny fraction of the Earth’s radius, the difference in weight won’t be something that can be measured as it’s a tiny fraction. So the mass of the rock doesn’t change what changes is the gravitational force ( g ). So the rock would still end up weighing 90lbs even at the top of the tower because it is still within the earths atmosphere.
