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The speed versus time graph of a moving ...

The speed versus time graph of a moving particle is shown in the following figure. If 'u' is the initial speed at `t=0`, v is the speed at time t, `a` is the acceleration and `s' is the distance covered in time `t`, then total area OABC is best described using. (Assume O as origin)

A

`v=u+at`

B

`s=ut+1/2 at^2`

C

`v^2=u^2 +2as`

D

`v=at`

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