3 ms·
Well, you are ignoring tides, I'm not. I say that theoretically, you could be at the Roche Limit, and then the pen would stay still. Hypothetical, yet real. So
by pothibo 13y ago
Well, you are ignoring tides, I'm not. I say that theoretically, you could be at the Roche Limit, and then the pen would stay still. Hypothetical, yet real. So thank you very much but yeah, the thought process stand correct.
http://en.wikipedia.org/wiki/Roche_limit http://en.wikipedia.org/wiki/Roche_limit
You can disagree all you want, it's not because things would just fall towards the moon in practice that it's impossible that the pen stand still.
- dennisgorelik 13y agoIt's funny how quickly that simple "Pen on the Moon" question can be turned from novice level into physics expert level. "Please select all possible conditions under which pen on the Moon would not fall on the ground".
- deleted 13y ago[deleted]
- mikeash 13y agoTides are purely about relative differences in gravity between positions, though, not about differences in pull between two bodies. You can still be at a point where the Earth's gravity is greater than the Moon's while on the surface of the Moon without anything floating away and while comfortably outside the Roche limit. In fact, such a situation must necessarily exist outside the Roche limit for any body.