A displacement is a vector whose length is the shortest distance from the initial to the final position of a point P. It quantifies both the distance and direction of an imaginary motion along a straight line from the initial position to the final position of the point.

The velocity of an object is the rate of change of its position with respect to a frame of reference, and is a function of time. Velocity is equivalent to a specification of an object's speed and direction of motion

In physics,accelerationis the rate of change of velocity of an object with respect to time. An object'saccelerationis the net result of all forces acting on the object, as described by Newton's Second Law. The SI unit foraccelerationis metre per second squared (m⋅s−2).

Displacement(symbolized d or s ), alsocalledlength or distance, is a one-dimensional quantity representing the separation between two defined points. The standard unit ofdisplacementin the International System of Units ( SI ) is the meter (m).Displacementis usually measured or defined along a straight line.

Velocityis a measure of how fast something moves in a particular direction. In other words, avelocityis a speed with a direction. For instance, if an object moves east at 9 metres per second (9m/s), we would say that itsvelocityis 9 m/s to the east.

accelerationis the rate of change of velocity of an object with respect to time. An object'saccelerationis the net result of all forces acting on the object, as described by Newton's Second Law. The SI unit foraccelerationis metre per second squared (m⋅s−2).