Name: free-fall acceleration on earth
Uploaded: 2023-09-22T11:49:39.000Z
Duration: 55 s
Channel: JoVE

Stellen Sie sich eine Dame vor, die einen Gepäckwagen schiebt, während sie sich bewegt. Die von ihr ausgeübte äußere Kraft beschleunigt den Wagen in Richtung der ausgeübten Kraft.
Wenn sie mit einer größeren Kraft schiebt, bewegt sich der Wagen schneller. Um den Wagen anzuhalten, muss sie eine äußere Kraft in die entgegengesetzte Richtung ihrer Bewegung ausüben.
Legt sie mehr Gepäck auf den Wagen, bewirkt die gleiche Kraft eine geringere Beschleunigung in Richtung der Netto-Außenkraft.
Wenn wir diese zusammensetzen, erhalten wir Newtons zweites Bewegungsgesetz, das besagt, dass ein Objekt proportional und in Richtung der äußeren Nettokraft und umgekehrt zu seiner Masse beschleunigt.
Oder die äußere Nettokraft, die auf ein Objekt wirkt, ist das Produkt aus seiner Masse und seiner Beschleunigung. Alle beschleunigenden Objekte folgen dem zweiten Newtonschen Gesetz.

beschleunigung durch schwerkraft auf der erde

Das zweite Gesetz von Newton ist eng mit seinem ersten Trägheitsgesetz verbunden. Es gibt mathematisch die Ursache-Wirkung-Beziehung zwischen Kraft und Bewegungsänderung an. Newtons zweites Gesetz ist quantitativ und wird umfangreich verwendet, um zu berechnen, was in Situationen mit einer Kraft passiert. Alle äußeren Kräfte, die auf ein System wirken, addieren sich, um eine resultierende Kraft Fnet zu erzeugen. Eine größere resultierende äußere Kraft erzeugt eine größere Beschleunigung. Diese Beschleunigung ist direkt proportional zur resultierenden äußeren Kraft und hat die gleiche Richtung wie diese.

Darüber hinaus scheint es auch vernünftig zu sein, dass die Beschleunigung umgekehrt proportional zur Masse eines Systems ist. Mit anderen Worten: je größer die Masse (die Trägheit), desto geringer die Beschleunigung, die durch eine gegebene Kraft erzeugt wird. Experimente haben gezeigt, dass die Beschleunigung genau umgekehrt proportional zur Masse ist, genau wie sie direkt proportional zur resultierenden äußeren Kraft ist. Es wurde festgestellt, dass die Beschleunigung eines Objekts nur von der resultierenden äußeren Kraft und der Masse des Objekts abhängt. Durch die Kombination der beiden Proportionalitäten ergibt sich das zweite Gesetz von Newton, das besagt: Die Beschleunigung eines Systems ist direkt proportional zur resultierenden äußeren Kraft und hat die gleiche Richtung wie diese und ist umgekehrt proportional zur Masse des Systems.

Das zweite Gesetz beschreibt, wie ein Körper mechanisch auf seine Umgebung reagiert. Der Einfluss der Umgebung ist die resultierende Kraft, die Reaktion des Körpers ist die Beschleunigung und die Stärke der Reaktion ist umgekehrt proportional zur Masse.

Newton hat auch sein zweites Gesetz in Bezug auf Impuls formuliert: Die momentane Änderungsrate des Impulses eines Körpers ist gleich der auf den Körper wirkenden resultierenden Kraft.

Dieser Text ist angepasst von <a href="https://openstax.org/books/university-physics-volume-1/pages/5-3-newtons-second-law">Openstax, University Physics Volume 1, Abschnitt 5.3: Newtons Zweites Gesetz. </a>

Beschleunigung durch Schwerkraft auf der Erde

Newtons zweites Gesetz ist eng verwandt mit seinem ersten Bewegungsgesetz. Sie gibt mathematisch die Ursache-Wirkungs-Beziehung zwischen Kraft und Veränderungen an ...

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Acceleration due to Gravity on Earth

free-fall acceleration on earth

Free-fall acceleration on Earth describes how fast an object speeds up when gravity is the only force acting on it. Near Earth’s surface, this acceleration is nearly constant for many everyday situations.

Gravity pulls objects toward Earth and gives them downward acceleration. This motion is often written as g, and it helps explain why falling objects gain speed as they move downward.

The value of g is commonly used in physics to predict the motion of objects dropped or released near the ground. It is an important idea for understanding motion on Earth and for solving basic mechanics problems.

Free-Fall Acceleration on Earth

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position and displacement

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position and displacement vectors

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acceleration due to gravity on earth

Free-fall acceleration on Earth describes how fast an object speeds up when gravity is the only force acting on it. Near Earth’s surface, this acceleration is nearly constant for many everyday situations. Gravity pulls objects toward Earth and gives them downward acceleration. This motion is often written as g, and it helps explain why falling objects gain speed as they move downward. The value of g is commonly used in physics to predict the motion of objects dropped or released near the...

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key terms and concepts

Learn how free-fall acceleration near Earth works, why gravity makes falling objects speed up, and how g is used in basic physics problems.

Free-Fall Acceleration on Earth | JoVE K12

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Free-Fall Acceleration on Earth

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