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(B) The distance-time graph for the motion of a particle from $A$ to $B$ is shown in the diagram.From the graph,the slope of the distance-time graph f

Vedclass · Accepted Answer

Average speed is always non-zero but instantaneous speed can be zero.

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(B) The distance-time graph for the motion of a particle from $A$ to $B$ is shown in the diagram.From the graph,the slope of the distance-time graph for the segments $A$ to $C$ and $D$ to $B$ is positive,which means the speed is non-zero in these intervals.Average speed is defined as the total distance covered divided by the total time taken. Since the total distance covered from $A$ to $B$ is non-zero,the average speed is always non-zero.Instantaneous speed is the slope of the distance-time graph at any given instant. In the segment $C$ to $D$,the graph is a horizontal line,meaning the distance does not change with time. Therefore,the slope is zero,which implies the instantaneous speed is zero during this interval.Thus,the average speed is always non-zero,but the instantaneous speed can be zero. Hence,option $B$ is correct.

$A$ particle covers a distance from $A$ to $B$ over a period of time; the distance versus time plot is shown below. Then which of the following is true for the motion of the particle?

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