In Science and Technology
- Drag (physics), the force which resists motion of an object through a fluid
- Drag equation, a mathematical equation used in analyzing the magnitude of drag caused by fluid flow
- Drag coefficient, a non-dimensional coefficient that is one of the terms in the drag equation
- Aerodynamic drag, the aerodynamic force which resists motion of an aircraft or other object through the air
- Drag crisis, a rapid change in drag coefficient over a small range of Reynolds number
- Park drag, a type of carriage
- Police drag, a small dredge used to recover objects or bodies lost in shallow water
- Drag harrow, in agriculture, a heavy type of harrow used to break up soil
- In computing, to hold down a mouse button while moving the mouse, as in drag-and-drop
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