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The position function of a police car is given bys(t)=- 3 1 t 3 2 5 t , where time, t, is in seconds, distance,

The position function of a police car is given bys(t)=-31t325t , where time,t, is in seconds, distance,s, is in metres, andt0. Find the acceleration of the car at the instant when the car reverses direction.

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