It is a graph of time versus velocity. Its slope t any point gives the acceleration at the corresponding instant. Distance covered in time t equals area under the velocity –time graph bounded by the time-axis.
(i) For uniform motion, the velocity-time graph is a straight line parallel to the time-axis.
(ii) For uniform acceleration, the velocity-time graph is a straight line inclined to the time-axis.
(iii) For variable acceleration, the velocity time graph is a curve.
