# Rectilinear Motion

Rectilinear motion is a one-dimensional spatial motion along a straight line. Rectilinear motion for a particle can be described by its position which varies with time. Rectilinear motion is the most basic of all motions because the vectors of position and velocity have equal and constant directions. Therefore, while analysing rectilinear motion, we can neglect the directional values and only deal with the magnitude, making it much simpler to analyse rectilinear motion systems. A photon in a ray of light without gravitational influence is the perfect example of rectilinear motion.