rolling - meaning and definition. What is rolling
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What (who) is rolling - definition

TYPE OF MOTION THAT COMBINES ROTATION AND TRANSLATION OF AN OBJECT WITH RESPECT TO A SURFACE WITH WHICH IT IS IN CONTACT
Rolled
  • animated GIF version]].
  • superposition]] of two motions: translation with respect to the surface, and rotation around its own axis.

rolling         
1.
Rolling hills are small hills with gentle slopes that extend a long way into the distance.
...the rolling countryside of south western France.
ADJ: ADJ n
2.
If you say that someone is rolling in it or is rolling in money, you mean that they are very rich. (INFORMAL)
= loaded
PHRASE: V inflects [emphasis]
rolling         
rolling
adjective (of land) extend in gentle undulations.
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rolling
adjective steady and continuous:
Rolling         
·p.pr. & ·vb.n. of Roll.
II. Rolling ·adj Moving on wheels or rollers, or as if on wheels or rollers; as, a rolling chair.
III. Rolling ·adj Having gradual, rounded undulations of surface; as, a rolling country; rolling land.
IV. Rolling ·adj Rotating on an axis, or moving along a surface by rotation; turning over and over as if on an axis or a pivot; as, a rolling wheel or ball.

Wikipedia

Rolling

Rolling is a type of motion that combines rotation (commonly, of an axially symmetric object) and translation of that object with respect to a surface (either one or the other moves), such that, if ideal conditions exist, the two are in contact with each other without sliding.

Rolling where there is no sliding is referred to as pure rolling. By definition, there is no sliding when there is a frame of reference in which all points of contact on the rolling object have the same velocity as their counterparts on the surface on which the object rolls; in particular, for a frame of reference in which the rolling plane is at rest (see animation), the instantaneous velocity of all the points of contact (e.g., a generating line segment of a cylinder) of the rolling object is zero.

In practice, due to small deformations near the contact area, some sliding and energy dissipation occurs. Nevertheless, the resulting rolling resistance is much lower than sliding friction, and thus, rolling objects, typically require much less energy to be moved than sliding ones. As a result, such objects will more easily move, if they experience a force with a component along the surface, for instance gravity on a tilted surface, wind, pushing, pulling, or torque from an engine. Unlike cylindrical axially symmetric objects, the rolling motion of a cone is such that while rolling on a flat surface, its center of gravity performs a circular motion, rather than a linear motion. Rolling objects are not necessarily axially-symmetrical. Two well known non-axially-symmetrical rollers are the Reuleaux triangle and the Meissner bodies. The oloid and the sphericon are members of a special family of developable rollers that develop their entire surface when rolling down a flat plane. Objects with corners, such as dice, roll by successive rotations about the edge or corner which is in contact with the surface. The construction of a specific surface allows even a perfect square wheel to roll with its centroid at constant height above a reference plane.

Examples of use of rolling
1. "It felt like the apartment was rolling _ shaking and rolling," said Pierre Guimard, 25, a home entertainment installer.
2. Q: Well, I mean -- U.S. forces are constantly rolling up -- and Iraqi forces are rolling up suspected insurgents.
3. Q÷ Well, I mean –– U.S. forces are constantly rolling up –– and Iraqi forces are rolling up suspected insurgents.
4. Meanwhile, Russian tanks were rolling into Georgia.
5. A weary couple, pulling rolling suitcases, waved.