Question

define motion along a straight line.

Answer 1

hey bro it answer..

Linear motion (also called rectilinear motion) is a one dimensional motion along a straight line, and can therefore be described mathematically using only one spatial dimension. ... The motion of a particle (a point-like object) along a linecan be described by its position , which varies with (time)....

Answer 2

rectilinear motion is the motion along a straight line. ex- light rays

hope it helps you