The initial velocity of a particle is \( u \) (at \( t=0 \) ) and the acceleration \( f \) is gi...

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The initial velocity of a particle is \( u \) (at \( t=0 \) ) and the acceleration \( f \) is given by at. Which of the following relation is valid
[CPMT 1981; BHU 1995]
(a) \( v=u+a t^{2} \)
(b) \( v=u+a \frac{t^{2}}{2} \)
(c) \( v=u+a t \)
(d) \( v=u \)
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