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Flight: Difference between revisions
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'''Flight''' | '''Flight: how it works''' | ||
[[category:Cool stuff]] | [[category:Cool stuff]] | ||
principles: | * principles: | ||
* | ** gravity pulls or attracts mass (anything with weight) towards the center of the earth | ||
* gravity | *** i.e., towards the ground | ||
** air has weight | |||
** air molecules and elements are diffuse (spread out) | |||
*** thus the atmosphere is not compacted by gravity | |||
*** it is more dense closer to the ground than higher up | |||
*** objects can push through air molecules and elements | |||
**** similarly to objects going through water | |||
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* gravity | * gravity | ||
** terminal velocity | ** terminal velocity | ||
* bullets and gravity | |||
** two bullets held at the same level, one by hand, the other in a gun | ** two bullets held at the same level, one by hand, the other in a gun | ||
** they both are released simultaneously | ** they both are released simultaneously | ||
** which hits the ground first? | ** which hits the ground first? | ||
** gravity acts on both equally, so they fall at the same time | *** gravity acts on both equally, so they fall at the same time | ||
*** actually the dropped bullet, as the earth is round, so the curvature of the earth would make the distance of the bullet fired in a straight line farther than the bullet dropped to the ground | **** actually the dropped bullet, as the earth is round, so the curvature of the earth would make the distance of the bullet fired in a straight line farther than the bullet dropped to the ground | ||