This is both a noun (a thing) and a verb (a doing word), so there can be âthe affectâ or we can say that âsomething is affectedâ. Both noun and verb are used, but the verb of this word is the more common, so I will deal with this first. As a verb, it means (1) to influence; move; touch; impress.
Shear is a directional word referring to forces or stresses. A shear force goes parallel to the surface of an object or material. Shear stress can happen between two objects or within the same object. A shear stress between two objects occurs when a force pulls the object along the same plane as the face of the object abutting another object that is being pulled in the opposite direction.
Specifically, the term most often refers to the planetary boundary layer, which is the layer within which the effects of friction are significant. For the earth, this layer is considered to be roughly the lowest one or two kilometers of the atmosphere.ariation in wind speed and/or direction over a short distance. Shear usually refers to vertical wind shear, i.e., the change in wind with height, but the term also is used in Doppler radar to describe changes in radial velocity over short horizontal distances.