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answer with explanation provided 4. A particle's displacement, s, as a function of time, t, along a line is given by the equation s (t)

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4. A particle's displacement, s, as a function of time, t, along a line is given by the equation s (t) = 3t2 - 5t + 6. (a) Determine its instantaneous velocity after 6 seconds. [2] (b) Determine its acceleration after 6 seconds. [2] (c) At what values of t does the particle change direction? [2]

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