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Velocity-time graph of a particle moving in a straight line is shown in figure. At time $t = 0$ , displacement of the particle from mean position is $10 m$ . Find acceleration of particle $(i n m / s^{2})$ at $t = 1 s, 3 s$ and $9 s$ ?

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5,0,-5

10,0,2.5

15,2,-5

5,0,5

answer is D.

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Detailed Solution

$a$ =slope of $v - t$ graph

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