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Gravity and Air Resistance Questions

Junior high studetn needs help with understanding concept behind grvaity. Help with following basic questions in simple terms please.

1. Imagine you started to walk towards the west. Imagine that you can walk forever and that you can even walk on water. If you walk in the same direction forever, what will happen? Where will you end up?

2. Imagine that there is a big hole that tunnels al the way through the center of the earth vertically. If you drop an apple down this hole what would happen? explaine answer using terms of gravity, air resistance.

3. Usiing the same thought from the above problem, only the tube is running horizontally through te center of the earth, what would happen if you dropped an apple.

4. What kinds of things have gravitational forces?

5. Are there any places in the universe where gravity does not exist?

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The solution is attached below in two files. the files are identical in content, only differ in format. The first is in MS Word XP ...