Re: Newton's Third Law and Inertia

On 2025-04-07 12:26:37 +0000, Luigi Fortunati said:

Mikko il 06/04/2025 13:50:11 ha scritto:

Newton's language and the language of Motte's translation are archaic.
Current language is cleared but it was developed much later.
>
Inertia is not a force. It is a phenomenon. Force is a number or vector
that quantifies an interaction.

>
Newton, with his archaic language, when he wrote "force" meant force

That does not make sense. In the midern language the word "force" has
a wide variety of different meanings. It had most of these meanings
already in 1729 when Motte translated Principia in English. However,
one important meaning is newer: a quantity in physics. As Newton did
not define the term before its use in the definition of "vis insita"
it must be intepreted according to its meaning in ordinary English of
the year 1729, or one must interprete the original Latin text according
to the common Latin meanings of the year 1726 when the 3rd edition of
Principia was published.

--
Mikko