Two objects are moving along the same straight line. They cross a point A with an acceleration a and 2 a and velocity 2 u and u at time t=0. The distance moved by the object when one overtakes the other is
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a
6u2a
b
2u2a
c
4u2a
d
8u2a
answer is A.
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Detailed Solution
At the time of overtaking.s1=s2 . 2ut+12at2 Therefore, 2u t +12at2=ut+12(2a)t2t ⇒t=2ua Therefore, s1=s2=(2u)2ua+12(a)2ua2 =6u2a