Properties of Motion on Superphysics

Types of Movement

Sun, 08 Sep 2024 00:00:00 +0000

EVERYTHING changes in 3 senses:

Accidentally

When we say that something musical walks, that which walks is something in which aptitude for music is an accident.

Without qualification to change

This is because something belonging to it changes, i.e. in statements which refer to part of the thing in question: thus the body is restored to health because the eye or the chest, that is to say a part of the whole body, is restored to health.

Motion in Substance and Relation

Sun, 08 Sep 2024 00:00:00 +0000

In Substance, there is no motion because Substance has no contrary among things that are.

Nor is there motion in respect of Relation: for it may happen that when one correlative changes, the other, although this does not itself change, is no longer applicable, so that in these cases the motion is accidental.

Definitions

Sun, 08 Sep 2024 00:00:00 +0000

I will define ‘together’, ‘apart’, ‘in contact’, ‘between’, ‘in succession’, ‘contiguous’, and ‘continuous’.

When are these terms naturally applicable?

Things are said to be together in place when they are in one place (in the strictest sense of the word ‘place’) and to be apart when they are in different places.

Motion is One

Sun, 08 Sep 2024 00:00:00 +0000

There are many senses in which motion is said to be ‘one’: for we use the term ‘one’ in many senses.

Motion is one generically according to the different categories to which it may be assigned: thus any locomotion is one generically with any other locomotion, whereas alteration is different generically from locomotion.

Relative Motion

Sun, 08 Sep 2024 00:00:00 +0000

What motions are contrary to each other?

How it is with rest?

Are contrary motions motions respectively from and to the same thing?

For example, a motion from health and a motion to health (where the opposition, it would seem, is of the same kind as that between coming to be and ceasing to be); or motions respectively from contraries, e.g. a motion from health and a motion from disease; or motions respectively to contraries, e.g. a motion to health and a motion to disease; or motions respectively from a contrary and to the opposite contrary, e.g. a motion from health and a motion to disease; or motions respectively from a contrary to the opposite contrary and from the latter to the former, e.g. a motion from health to disease and a motion from disease to health: for motions must be contrary to one another in one or more of these ways, as there is no other way in which they can be opposed.

Contrary Motions

Sun, 08 Sep 2024 00:00:00 +0000

A motion has its contraries in:

another motion
a state of rest

A motion has for its contrary in the strict sense of the term another motion, but it also has for an opposite a state of rest (for rest is the privation of motion and the privation of anything may be called its contrary), and motion of one kind has for its opposite rest of that kind, e.g. local motion has local rest.