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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

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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