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Single Idea 15866
[filed under theme 27. Natural Reality / A. Classical Physics / 1. Mechanics / a. Explaining movement
]
Full Idea
Following Kepler, Newton assumed a law of universal gravitation, thus reclassifying free fall as a violent motion and, with his First Law, fixing horizontal motion in the absence of constraints as natural
Gist of Idea
Newton reclassified vertical motion as violent, and unconstrained horizontal motion as natural
Source
report of Isaac Newton (Principia Mathematica [1687]) by Rom Harré - Laws of Nature 1
Book Ref
Harré,Rom: 'Laws of Nature' [Duckworth 1993], p.26
A Reaction
This is in opposition to the Aristotelian view, where the downward motion of physical objects is their natural motion.
The
41 ideas
from 'Principia Mathematica'
18079
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Newton developed a kinematic approach to geometry
[Newton, by Kitcher]
|
17546
|
If you changed one of Newton's concepts you would destroy his whole system
[Heisenberg on Newton]
|
17547
|
Newton's idea of force acting over a long distance was very strange
[Heisenberg on Newton]
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6421
|
Newton's four fundamentals are: space, time, matter and force
[Newton, by Russell]
|
13470
|
Mass is central to matter
[Newton, by Hart,WD]
|
23012
|
Newtonian causation is changes of motion resulting from collisions
[Newton, by Baron/Miller]
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17008
|
You have discovered that elliptical orbits result just from gravitation and planetary movement
[Newton, by Leibniz]
|
20968
|
Newton's Third Law implies the conservation of momentum
[Newton, by Papineau]
|
15866
|
Newton reclassified vertical motion as violent, and unconstrained horizontal motion as natural
[Newton, by Harré]
|
15958
|
Inertia rejects the Aristotelian idea of things having natural states, to which they return
[Newton, by Alexander,P]
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20966
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Newton introduced forces other than by contact
[Newton, by Papineau]
|
20967
|
Newton's laws cover the effects of forces, but not their causes
[Newton, by Papineau]
|
16708
|
Newton's forces were accused of being the scholastics' real qualities
[Pasnau on Newton]
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22915
|
Newton needs intervals of time, to define velocity and acceleration
[Newton, by Le Poidevin]
|
22893
|
Newton thought his laws of motion needed absolute time
[Newton, by Bardon]
|
13593
|
Newton showed that falling to earth and orbiting the sun are essentially the same
[Newton, by Ellis]
|
20969
|
Early Newtonians could not formulate conservation of energy, having no concept of potential energy
[Newton, by Papineau]
|
22954
|
Newtonian mechanics does not distinguish negative from positive values of time
[Newton, by Coveney/Highfield]
|
17011
|
I suspect that each particle of bodies has attractive or repelling forces
[Newton]
|
17010
|
We have given up substantial forms, and now aim for mathematical laws
[Newton]
|
13153
|
I am studying the quantities and mathematics of forces, not their species or qualities
[Newton]
|
17020
|
An attraction of a body is the sum of the forces of their particles
[Newton]
|
17019
|
3: All actions of bodies have an equal and opposite reaction
[Newton]
|
17017
|
1: Bodies rest, or move in straight lines, unless acted on by forces
[Newton]
|
17018
|
2: Change of motion is proportional to the force
[Newton]
|
17024
|
The elegance of the solar system requires a powerful intellect as designer
[Newton]
|
17026
|
From the phenomena, I can't deduce the reason for the properties of gravity
[Newton]
|
17025
|
If a perfect being does not rule the cosmos, it is not God
[Newton]
|
17028
|
Particles mutually attract, and cohere at short distances
[Newton]
|
17027
|
Science deduces propositions from phenomena, and generalises them by induction
[Newton]
|
17022
|
We should admit only enough causes to explain a phenomenon, and no more
[Newton]
|
17021
|
Natural effects of the same kind should be assumed to have the same causes
[Newton]
|
17023
|
I am not saying gravity is essential to bodies
[Newton]
|
17014
|
The place of a thing is the sum of the places of its parts
[Newton]
|
17016
|
Philosophy must abstract from the senses
[Newton]
|
17012
|
Time exists independently, and flows uniformly
[Newton]
|
17015
|
If there is no uniform motion, we cannot exactly measure time
[Newton]
|
17013
|
Absolute space is independent, homogeneous and immovable
[Newton]
|
14012
|
Absolute time, from its own nature, flows equably, without relation to anything external
[Newton]
|
18082
|
Quantities and ratios which continually converge will eventually become equal
[Newton]
|
12724
|
The aim is to discover forces from motions, and use forces to demonstrate other phenomena
[Newton]
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