Question

Describe the motion depicted in the given below graphs. (The body is moving in a straight line in all 3 cases)

Answer 1

Acceleration is defined as the rate of change of velocity. Since, the motion is in a straight line the magnitude of velocity and speed will be equal.
In graph A, we can see that the slope of the graph is increasing, hence the speed is increasing with time. Thus the graph represents uniform acceleration.

In graph B, the slope is 0 i.e. the speed does not change with time. Hence the acceleration is zero.
In graph C, the slope is negative, hence it has uniform retardation.