what is velocity time graph

When the object is in motion, its velocity, i.e, speed in specified direction is plotted as a function of time.

 

In x-axis time is considered and y-axis velocity is considered.

 

From the slope of velocity-time graph , we know the motion is uniform or accelerated motion.

 

Area under the graph between two time instances gives the distance travelled by the object in the the time duration .

 

In graph-(a) velocity is constant for all time . Hence it is uniform motion.

In graph-(b) velocity keeps on increasing , hence it is accelerated motion

In graph-(c) velocity keeps on decreasing, hence it is retarded motion.

 

Area between two time instances gives the distance travelled in the time duration.