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Isaac Newton's rotating bucket argument (also known as Newton's bucket) was designed to demonstrate that true rotational motion cannot be defined as the relative rotation of the body with respect to the immediately surrounding bodies. It is one of five arguments from the "properties, causes, and effects" of "true motion and rest" that support his contention that, in general, true motion and rest cannot be defined as special instances of motion or rest relative to other bodies, but instead can be defined only by reference to absolute space. Alternatively, these experiments provide an operational definition of what is meant by "absolute rotation", and do not pretend to address the question of "rotation relative to what?" General relativity dispenses with absolute space and with physics whose

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  • El cubo de Newton (es)
  • Bucket argument (en)
  • Experiência do balde de Newton (pt)
  • Ведро Ньютона (ru)
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  • Ведро Ньютона — это простой физический эксперимент, которому даны различные объяснения, исходя из различных модельных представлений о пространстве и времени. (ru)
  • Isaac Newton's rotating bucket argument (also known as Newton's bucket) was designed to demonstrate that true rotational motion cannot be defined as the relative rotation of the body with respect to the immediately surrounding bodies. It is one of five arguments from the "properties, causes, and effects" of "true motion and rest" that support his contention that, in general, true motion and rest cannot be defined as special instances of motion or rest relative to other bodies, but instead can be defined only by reference to absolute space. Alternatively, these experiments provide an operational definition of what is meant by "absolute rotation", and do not pretend to address the question of "rotation relative to what?" General relativity dispenses with absolute space and with physics whose (en)
  • El argumento del cubo de Newton fue ideado por Isaac Newton para demostrar la necesidad de la existencia de una fuerza centrífuga en un movimiento de giro. Para que una masa gire, es necesario que una fuerza actúe siempre en dirección perpendicular a la velocidad con la que se desplaza la masa, es decir apuntando hacia el centro de giro. Esa fuerza puede ser de cualquier origen, y la fuerza necesaria es directamente proporcional al cuadrado de la velocidad de la masa que gira, con lo cual si se realiza un giro a gran velocidad es preciso una fuerza de gran magnitud. Por eso si se llena un cubo con agua y se lo hace girar con rapidez, aunque lo hagamos girar en un plano perpendicular, el agua del cubo no se vierte al pasar por el punto más alto de la trayectoria, para sorpresa de mucha gent (es)
  • A experiência do balde de Newton consiste em girar um balde suspenso por uma corda até a corda ficar bastante torcida, e então encher o balde com água e soltá-lo. Nota-se que enquanto a corda desenrola-se, a superfície da água, que de início era plana, vai ficando curva. Isaac Newton descreve a experiência em sua obra Philosophiae Naturalis Principia Mathematica para tentar provar a existência do , argumentando que numa rotação apenas relativa a superfície é plana, já a superfície curva indicaria um movimento absoluto. (pt)
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  • http://commons.wikimedia.org/wiki/Special:FilePath/ForceDiagram.png
  • http://commons.wikimedia.org/wiki/Special:FilePath/Mach_bucket.svg
  • http://commons.wikimedia.org/wiki/Special:FilePath/Parabola_shape_in_rotating_layers_of_fluid.jpg
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