In Newtonian mechanics, displacement is the vector that specifies the position of a point or a particle in reference to an origin or to a previous position. The vector directs from the reference point to the current position. It has been suggested that this article or section be merged with Classical mechanics. ... In physics and in vector calculus, a spatial vector is a concept characterized by a magnitude, which is a scalar, and a direction (which can be defined in a 3-dimensional space by the Euler angles). ...

Displacement vector versus distance travelled along a path

When the reference point is the origin of the chosen axis-system, the displacement vector is better referred to as the position vector, which expresses position by the straight line directed from the origin to the current position (as opposed to the scalar quantity distance which expresses only the length). The SI unit for either distance or the displacement magnitude is the meter. This use of displacement vector can describe the complete motion as well as the path of the particle. distance v displacement File links The following pages link to this file: Distance Displacement (distance) Categories: GFDL images ... distance v displacement File links The following pages link to this file: Distance Displacement (distance) Categories: GFDL images ... In physics, a scalar is a simple physical quantity that does not depend on direction, and therefore does not depend on the choice of a coordinate system. ... Cover of brochure The International System of Units. ... The metre, or meter (symbol: m) is the SI base unit of length. ...

When the reference point is a previous position of the particle, the displacement vector indicates the sense of movement by a vector directing from the previous position to the current position. This use of displacement vector is useful for defining the velocity and acceleration vectors of the particle.

By plotting the displacement (relative to the starting point) against time on a position vs. time graph, the average velocity or the instantaneous velocity can be found by taking the slope of the graph or the derivative of the graph, respectively. The green line shows the slope of the velocity-time graph at the particular point where the two lines touch. ... The velocity of an object is simply its speed in a particular direction. ... In mathematics, a derivative is defined as the instantaneous rate of change of a function and the process of finding the derivative is called differentiation. ...

In dealing with the motion of a rigid/firm body, the term displacement may also include the rotations of the body.so?