Timeline for A force opposing Gravity
Current License: CC BY-SA 3.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Aug 30, 2014 at 3:23 | comment | added | Harry David | True, I guess so. | |
| Aug 30, 2014 at 0:12 | comment | added | Jester | @HarryDavid in practice, sure. But I guess that should exert negligible force compared to the top side. | |
| Aug 29, 2014 at 11:17 | comment | added | Harry David | But surly, even though the book is flat against the tabletop there will be some air under it- seeing as it was simply placed there and not forming a vacuum seal. | |
| Aug 28, 2014 at 15:02 | comment | added | Jester | When the book is lying on the table, there is no air underneath, so the air pressure should be pushing down on it from the top (the sides cancel out). As such, I think that adds to the nominal weight, but you subtracted it. | |
| Aug 28, 2014 at 0:15 | history | answered | David Hammen | CC BY-SA 3.0 |