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A particle is moving along a straight li...

A particle is moving along a straight line along x-zxis with an initial velocity of `4 m//s` towards positive x-axis. A constant acceleration of `1 m//s^(2)` towards negative x-axis starts acting on particle at `t=0`. Find velocity (in `m//s`) of particle at `t=2 s`.

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The correct Answer is:
5
In last second of upward journey, all bodies travel same distance `(=g//2=5m)`
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