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Example 3.2 The position of an objectmoving along x-axis is given by x a+ btwhere a#8.5 m, b#2.5 m s-2 and t ismeasured in seconds. What is its velocity att 0 s and t 2.0 s. What is the averagevelocity between t = 2.0 s and t = 4.0 s ?

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