Q.) A body has an initial velocity of 3 m/s and has an acceleration of 1 m/s² normal to the direction of the initial velocity. Then its velocity 4 s after the start is
[A]7 m/s along the direction of initial velocity.
[B]7 m/s along the normal to the direction of initial velocity.
[C]7 m/s mid-way between the two directions.
[D]5 m/s at an angle tan⁻¹(4/3) with the direction of initial velocity.
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