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  • Among the four graphs (Fig. 3.1), there is only one graph for which average velocity over the time interval (0, T ) can vanish for a suitably chosen T. Which one is it?

Among the four graphs (Fig. 3.1), there is only one graph for which average velocity over the time interval (0, T ) can vanish for a suitably chosen T. Which one is it?

 

Answers (1)

The correct answer is the option (b)

Explanation: In graph (b) displacements are in the opposite direction & when we add them, we get net displacement & average velocity as zero. It satisfies the condition of displacement for different timings.

Let us draw a parallel line from A to the time axis at t=0s. It intersects the graph at B & the change in displacement time is zero. So, the displacement from A to B = 0 & hence the average velocity of the body also vanishes to 0.

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