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John Philoponus Arguments On Aristotle's Theory Of Motion

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Stanford Encyclopedia of Philosophy (8 June 2007) states that in approximately 530 AD a philosopher named John Philoponus developed an early concept of momentum to comment on Aristotle’s Physics. Aristotle had claimed that everything that moves must be kept moving by something. For example, when you throw a ball it must be kept moving by the motion of the air. Philoponus however, believed that a force acted on an object when you threw it. Most Philosophers, although sceptical, accepted this theory of motion until the time of Galileo. Aydin Sayili (1987) states in 1020 Ibn Sīnā, also known as Avicenna read Philoponus’s theory and published his own theory of motion in “The Book of Healing”. He agreed with Philoponus that a force acted on an object
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