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Question

Two objects moving along the same straight line are leaving point A with an acceleration a, 2 a & velocity 2u, u respectively at time t =0. The distance moved by the object with respect to point A when one object overtakes the other is

A
6u2a
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B
2u2a
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C
4u2a
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D
none of these
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Solution

The correct option is A 6u2a
Let both will meet at point B
x=2ut+1/2at2
x=ut+12(2a)t2
So 2ut+12at2=ut+at2
ut=12at2t=2ua
So x=2u(2ua)+12a(2ua)2=6u2a
133833_72271_ans.jpg

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