Name: gravity between masses and distance
Uploaded: 2023-09-22T11:49:18.000Z
Duration: 1 min 24 s
Channel: JoVE

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Earth’s Place In The Universe

HS-ESS1-4

Newton's Law of Gravitational Attraction

La legge di attrazione gravitazionale di Newton afferma che quando due particelle di massa m1 e m2 sono separate dalla distanza r, si attraggono l'una con l'altra con forze uguali e opposte.
La forza di attrazione agisce lungo la linea che unisce le particelle e varia direttamente come prodotto delle loro masse e inversamente come il quadrato della distanza tra di loro, dove G è la costante universale nota come costante gravitazionale.
La forza di attrazione gravitazionale esercitata dalla Terra su un oggetto è il peso dell'oggetto. È il prodotto della massa dell'oggetto e dell'accelerazione dovuta alla gravità, espressa in newton.
I separatori a gravità, i martelli a caduta e i trasportatori a gravità sono alcuni strumenti meccanici che funzionano secondo il principio della legge di gravitazione di Newton.
Considera il processo di forgiatura a martello. Qui, il martello di un peso specifico viene sollevato a una certa altezza e poi lasciato cadere liberamente.
Poiché la Terra ha una forte attrazione gravitazionale, il martello cade sempre. La forza creata da questa caduta dà la forma richiesta ai pezzi.

<ol>
	<li>Hibbeler, R.C. (2016). Ingegneria Meccanica \u2012 Statica e Dinamica. Hoboken, New Jersey: Pearson Prentice Hall. pagine 7</li>
	<li>Birra, F.P.; Johnston, E.R.; Mazurek, D.F; Cromwell, P.J. e Self, B.P. (2019). Meccanica vettoriale per ingegneri \u2012 Statica e dinamica. New York: McGraw-Hill. pp 4 e 5</li>
	<li>Meriam, J.L.; Kraige, LG e Bolton, JN (2020). Ingegneria Meccanica \u2012 Statica. Hoboken, New Jersey: John Wiley. pagine 7 e 8</li>
</ol>

legge di attrazione gravitazionale di newton

Sir Isaac Newton ha stabilito l'universalità della legge di attrazione gravitazionale basandosi su prove empiriche e ragionamenti induttivi. Ha pubblicato il suo lavoro in "Philosophiae Naturalis Principia Mathematica" (i "Principia") il 5 luglio 1687.

La legge di attrazione gravitazionale di Newton è una legge fondamentale della fisica che regola l'attrazione tra gli oggetti. Questa legge afferma che l’intensità della forza gravitazionale tra due oggetti qualsiasi è proporzionale alle loro masse e inversamente proporzionale al quadrato della loro distanza.

La gravità quindi è più forte tra oggetti con massa maggiore. Ogni coppia di corpi è soggetta alle forze gravitazionali. Una delle applicazioni più comuni di questa legge è la nostra comprensione del moto dei pianeti nel sistema solare. La forza gravitazionale tra i pianeti e il Sole è responsabile del loro movimento intorno ad esso e spiega anche fenomeni come le maree, causate dalla forza gravitazionale della Luna sulla Terra.

Un altro esempio in cui viene utilizzata questa legge è nella progettazione delle montagne russe. I carrelli delle montagne russe vengono messi in movimento con una catena di sollevamento, che fornisce la forza iniziale per spingere il carrello sulla prima ripida salita. Una volta in cima, la gravità tira il carrello lungo i binari attraverso una serie di curve, anelli e discese.

La legge di gravitazione universale è importante perché è stata efficace nell'esplicare molti fenomeni, come il modo in cui diversi oggetti nell'universo macroscopico si influenzano a vicenda,, la gravità che influenza il peso di un corpo e ci tiene fermi a terra, la luna che si muove intorno alla Terra, come avviene il moto dei pianeti, la generazione di forze di marea e così via.

Legge di attrazione gravitazionale di Newton

Sir Isaac Newton stabilì l'universalità della legge di attrazione gravitazionale sulla base dell'evidenza empirica e del ragionamento induttivo. Ha pubblicato il suo ...

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gravity between masses and distance

Newton’s law of gravitational attraction describes how gravity acts between two objects. Sir Isaac Newton built this law from empirical evidence and inductive reasoning. He published it in Philosophiae Naturalis Principia Mathematica, or the Principia, on July 5, 1687.

The law says that the gravitational force between any two objects depends on their masses and their distance apart. The force is proportional to mass and inversely proportional to the square of the distance between the objects. In simple terms, larger masses create stronger gravity, while greater distance weakens the force.

Every pair of bodies experiences gravitational force. This law helps explain the motion of the planets in the solar system. The pull between the Sun and the planets keeps them moving around the Sun.

Newton’s law also explains tides on Earth. The Moon’s gravitational force on Earth produces tidal forces. The same idea helps describe roller coasters, too. A chain lift hill gives the cart its initial motion up the first steep hill, and then gravity pulls it down through turns, loops, and drops.

This universal law of gravitation is important because it explains many large-scale effects in the macroscopic universe. It accounts for a body’s weight and helps keep us on the ground. It also describes the Moon’s motion around Earth, planetary motion, and the generation of tides.

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Gravity Between Masses and Distance

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