<P> 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 linear motion can be of two types : uniform linear motion with constant velocity or zero acceleration ; non uniform linear motion with variable velocity or non-zero acceleration . The motion of a particle ( a point - like object ) along a line can be described by its position x ( \ displaystyle x ) , which varies with t ( \ displaystyle t ) ( time ) . An example of linear motion is an athlete running 100m along a straight track . </P>
<P> 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 linear motion can be of two types : uniform linear motion with constant velocity or zero acceleration ; non uniform linear motion with variable velocity or non-zero acceleration . The motion of a particle ( a point - like object ) along a line can be described by its position x ( \ displaystyle x ) , which varies with t ( \ displaystyle t ) ( time ) . An example of linear motion is an athlete running 100m along a straight track . </P>
motion in a straight line at constant speed is called
motion in a straight line at constant speed is called
uniform linear motion
uniform linear motion