Scorching goIITian
@allamraju:you can use the v=u+at only when a is non changing.
E=A-Bx=>a=...so integrate and find..x=0(which is given also)and x=2A/B..so the answer is B) .
}{m}\;a=v\frac{dv}{dx})
...so integrate and find..x=0(which is given also)and x=2A/B..so the answer is B) 
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Moderation Team
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