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The acceleration of a particle is given ...

The acceleration of a particle is given by the relation as `a = -kv^(5//2)` , where is a constant. The particle starts at x=0 with a velocity of 16 m/s, and when x = 6, the velocity is observed to be 4 m/s. Find the velocity of particle when x=5m and the time at which the velocity ofthe particle is 9 m/s.

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