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Q.

A particle starting with certain initial velocity and uniform acceleration covers a distance of 12 m in first 3 seconds and a distance of 30 m in next 3 seconds. The initial velocity of the particle is  

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a

2ms−1

b

1ms−1

c

3ms−1

d

2.5ms−1

answer is A.

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Detailed Solution

S1=ut1+12at12
12=3u+129a......1
S1+S2=ut1+t2+12at1+t22
⇒42=64+12a36........2
⇒u=1ms−1and a=2.5ms−2

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