Q.

The velocity-time plot is shown in figure. Find the average speed in time interval t = 0 to t = 40 s during the period.

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a

zero

b

2.5 m/s

c

5 m/s

d

none

answer is B.

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Detailed Solution

Distance covered D = 2[12×20×5] = 100 mAverage speed = D40 = 10040  = 2.5 m/s
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