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, Mon, 2 Aug 2010 10:17:23
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Well okay not like on Star Trek! ;^)
Think of it this way... a plane is flying level in a normal orientation. Now the pilot pulls back on the yoke, causing the plane's nose to rise. As a passenger, you feel pressed into your seat, as if the force of gravity increased. Of course that's not the case, what's actually happening is the plane is forcing you upward, but it feels like you're being pulled downward. And the harder the pilot pulls on the yoke, the greater the force that you sense pulling you (and everything else, like, say, a pitcher of iced tea) toward the floor.
Now imagine exactly the same thing happening, but when the plane is upside-down. Gravity is now pulling you toward the ceiling of the plane. But by pulling on the yoke, the pilot can create a force that seems to pull you toward the floor. Depending on how strong that force is, it can reduce the apparent effect of gravity, cancel it out, or overpower it. If the pilot pulls hard enough to create a force toward the floor of 2G, when you subtract out the 1G pulling you toward the ceiling (remember the plane is still upside-down), you'll end up with a 1G apparent force pulling toward the floor. This is the same as when the plane is flying straight & level, and everything would seem the same, including that poured liquids would go toward the floor.
And if you think that explanation was difficult, try making it actually happen in an airplane! :^)
Eric
posted by 72.93.22...
, Fri, 30 Jul 2010 07:13:45, Sat, 31 Jul 2010 17:45:01
, Thu, 5 Aug 2010 19:41:15, Mon, 2 Aug 2010 10:17:23, Fri, 30 Jul 2010 11:07:52, Sat, 31 Jul 2010 17:37:43, Sat, 31 Jul 2010 19:31:37, Fri, 30 Jul 2010 08:35:37, Fri, 30 Jul 2010 13:04:03
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