The nature of v - t curve is as shown below. The acceleration curve will be:
When the velocity is variable i.e., when the motion is accelerated. The displacement - time graph will not be straight line since the displacement will not be proportional to the time because ‘v’ is not constant; but it will be a curve, the nature of the curve depending of the nature of the variation in the velocity. Draw a graph to illustrate this.
The figure shown below is not a closed curve.