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27. Natural Reality / A. Classical Physics / 1. Mechanics / a. Explaining movement

[explaining why not all things are stationary]

30 ideas
Thales must have thought soul causes movement, since he thought magnets have soul [Thales, by Aristotle]
All things are in a state of motion [Heraclitus, by Aristotle]
It is feeble-minded to look for explanations of everything being at rest [Aristotle on Parmenides]
That which moves, moves neither in the place in which it is, nor in that in which it is not [Zeno of Elea]
There is no real motion, only the appearance of it [Melissus, by Diog. Laertius]
Practical reason is based on desire, so desire must be the ultimate producer of movement [Aristotle]
If all movement is either pushing or pulling, there must be a still point in between where it all starts [Aristotle]
If the more you raise some earth the faster it moves, why does the whole earth not move? [Aristotle]
Motion fulfils potentiality [Aristotle]
If movement can arise within an animal, why can't it also arise in the universe? [Aristotle]
When there is unnatural movement (e.g. fire going downwards) the cause is obvious [Aristotle]
Motion can't move where it is, and can't move where it isn't, so it can't exist [Pyrrho, by Diog. Laertius]
If there were no space there could be no movement, or even creation [Lucretius]
Atoms move themselves [Lucretius]
A man walking backwards on a forwards-moving ship is moving in a fixed place [Sext.Empiricus]
Does the original self-mover push itself from behind, or pull itself from in front? [Sext.Empiricus]
If time and place are infinitely divided, it becomes impossible for movement ever to begin [Sext.Empiricus]
If all atoms, times and places are the same, everything should move with equal velocity [Sext.Empiricus]
Motion is losing one place and acquiring another [Hobbes]
Newton reclassified vertical motion as violent, and unconstrained horizontal motion as natural [Newton, by Harré]
Motion is just change of distance between two things [Locke]
Maybe motion is definable as 'change of place' [Leibniz]
All that is real in motion is the force or power which produces change [Leibniz]
Bodies are recreated in motion, and don't exist in intervening instants [Leibniz]
Russell's 'at-at' theory says motion is to be at the intervening points at the intervening instants [Russell, by Psillos]
Occupying a place and change are prior to motion, so motion is just occupying places at continuous times [Russell]
We perceive motion, and not just successive occupations of different positions [Harré/Madden]
We only see points in motion, and thereby infer movement [Rescher]
If motion is change of distance between objects, it involves no intrinsic change in the objects [Lowe]
Maybe motion is a dynamical quantity intrinsic to a thing at a particular time [Sider]