Q.

A particle starts its motion from rest and moves with constant acceleration for time t1 and then it retards with constant rate for time t2 until it comes to rest. Then the ratio of maximum speed and average speed during the complete motion will be

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a

2 : 1

b

1 : 2

c

2:3

d

1:3

answer is A.

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Detailed Solution

Required ratio =V Area /t1+t2=21
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A particle starts its motion from rest and moves with constant acceleration for time t1 and then it retards with constant rate for time t2 until it comes to rest. Then the ratio of maximum speed and average speed during the complete motion will be