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Q.

A particle covers half of its total distance with speed v1 and the rest half distance with speed v2. Its average speed during the complete journey

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a

v1v2v1+v2

b

2v1v2v1+v2

c

2v12v22v12+v22

d

v1+v22

answer is B.

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Detailed Solution

Average Velocity  v = Total distancetotal time  Average speed of particle vavg = s+ssv1+sv2⇒vav = 2v1v2v1+v2
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