- #1
Timothy Schablin
- 17
- 0
Consider the 2 objects in the pic. They both have the same mass of 200 kg. They both have a radius of 4 meters. However, the object on the right is hollow, with the walls being 2 meters thick. For the gravity equation, and the object on the right, does one use a radius of 4 squared, or the wall thickness of 2 squared?
![a>](http://<a href="http://s30.photobucket.com/user/meopilite/media/object_1.jpg.html" target="_blank"><img src="http://i30.photobucket.com/albums/c320/meopilite/object_1.jpg" border="0" alt=" photo object_1.jpg"/></a>)