Concept

Drag (physics)

Overview

retarding force on a body moving in a fluid

Overview adapted from Wikipedia (CC BY-SA 4.0; see the article history for authors).

Found by search and not yet checked by a person; they may only mention the idea in passing.

This is called by the schools a motion to prevent a vacuum. It takes place when water is drawn up by suction or a syringe, the flesh by cupping, or when the water remains without escaping from perforated jars, unless the mouth be opened to admit the air, and innumerable instances of a like nature.
Francis Bacon, Novum organum
States what Drag is.
Read the chapter · Open in the reader
What special transformations of force generate these various mechanical changes, we do not, in most cases, know. Those re-distributions of liquid, with the alterations of form sometimes caused by them, that result from osmose, are not, indeed, incomprehensible.
Herbert Spencer, The Principles of Biology, Volume 1
Close in meaning to Drag; the term itself is not named.
Read the chapter · Open in the reader
From moment to moment, the motion of water towards the Earth’s centre is opposed by the solid matter around and under it; and from moment to moment its route is the resultant of the lines of greatest traction and least resistance. So far from a cascade furnishing, as it seems to do, an exception, it furnishes but another illustration.
Herbert Spencer, First Principles
Close in meaning to Drag; the term itself is not named.
Read the chapter · Open in the reader