Fall

Fall

Fall, die Bewegung eines freien Körpers nach dem Mittelpunkt der Erde hin infolge der Schwerkraft. Da dieselbe gleichmäßig beschleunigend wirkt, nimmt die Geschwindigkeit des F. in dem Verhältnis der Fallzeit zu, sie ist im luftleeren Raum unabhängig vom Gewicht und der Dichte des fallenden Körpers, daher für alle gleich groß. Aus dieser Geschwindigkeitszunahme ergibt sich, daß für verschiedene große Fallzeiten, vom Beginn des F. an gerechnet, die Fallräume sich wie die Quadrate der Fallzeiten verhalten. Die nach der ersten Fallsekunde erreichte Endgeschwindigkeit eines fallenden Körpers (gewöhnlich mit g bezeichnet) wird als das Maß der Schwere betrachtet; sie beträgt an der Erdoberfläche durchschnittlich 9,81 m, an der des Mondes etwa 2 m, an der der Sonne über 28 m. Der Fallraum in der ersten Sekunde ist gleich der Hälfte von g.


http://www.zeno.org/Brockhaus-1911. 1911.

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  • Fall — (f[add]l), v. i. [imp. {Fell} (f[e^]l); p. p. {Fallen} (f[add]l n); p. pr. & vb. n. {Falling}.] [AS. feallan; akin to D. vallen, OS. & OHG. fallan, G. fallen, Icel. Falla, Sw. falla, Dan. falde, Lith. pulti, L. fallere to deceive, Gr. sfa llein… …   The Collaborative International Dictionary of English

  • Fall — Fall, n. 1. The act of falling; a dropping or descending be the force of gravity; descent; as, a fall from a horse, or from the yard of ship. [1913 Webster] 2. The act of dropping or tumbling from an erect posture; as, he was walking on ice, and… …   The Collaborative International Dictionary of English

  • Fall — Fall, v. t. 1. To let fall; to drop. [Obs.] [1913 Webster] For every tear he falls, a Trojan bleeds. Shak. [1913 Webster] 2. To sink; to depress; as, to fall the voice. [Obs.] [1913 Webster] 3. To diminish; to lessen or lower. [Obs.] [1913… …   The Collaborative International Dictionary of English

  • fall in — {v.} 1. To go and stand properly in a row like soldiers. * /The captain told his men to fall in./ Contrast: FALL OUT(3). 2. to collapse. * /The explosion caused the walls of the house to fall in./ …   Dictionary of American idioms

  • fall in — {v.} 1. To go and stand properly in a row like soldiers. * /The captain told his men to fall in./ Contrast: FALL OUT(3). 2. to collapse. * /The explosion caused the walls of the house to fall in./ …   Dictionary of American idioms

  • fall in — or[into place] {v. phr.} To suddenly make sense; find the natural or proper place for the missing pieces of a puzzle. * /When the detectives realized that a second man was seen at the place of the murder, the pieces of the puzzle began to fall… …   Dictionary of American idioms

  • fall in — or[into place] {v. phr.} To suddenly make sense; find the natural or proper place for the missing pieces of a puzzle. * /When the detectives realized that a second man was seen at the place of the murder, the pieces of the puzzle began to fall… …   Dictionary of American idioms

  • fall to — {v.} 1. To begin to work. * /The boys fell to and quickly cut the grass./ Syn.: TURN TO. 2. To begin to fight. * /They took out their swords and fell to./ 3. To begin to eat. * /The hungry boys fell to before everyone sat down./ 4. Begin; start.… …   Dictionary of American idioms

  • fall to — {v.} 1. To begin to work. * /The boys fell to and quickly cut the grass./ Syn.: TURN TO. 2. To begin to fight. * /They took out their swords and fell to./ 3. To begin to eat. * /The hungry boys fell to before everyone sat down./ 4. Begin; start.… …   Dictionary of American idioms

  • fall — I. verb (fell; fallen; falling) Etymology: Middle English, from Old English feallan; akin to Old High German fallan to fall and perhaps to Lithuanian pulti Date: before 12th century intransitive verb 1. a. to descend freely by the force of… …   New Collegiate Dictionary

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