Answer:
Option B
Explanation:
The distance versus time plot for movement of a particle from A and B is shown in the diagram
From graph , it is slope of distance-time graph for position A to C and D to B is always positive, therefore both the average speed and instantaneous speed are not always zero, therefore, option (a) is not correct.
Average velocity= Total displacement from A to B / Total time interval
Since, total displacement depends on straight distance between initial and final points, hence, the displacement between A to B always non zero. therefore the average speed is always non zero.
Since, no distance is travelled between point C to D is zero. Hence, instantaneous speed at every instant between C to D is zero.
Hence, option (b) is correct and option (c) and (d) are incorrect.
