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The position function of an object moving along a straight line is given by the function...

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Basic Math

The position function of an object moving along astraight line is given by the function t3 - 15t2 -48t -10, where sis in metres and t is in seconds and 0?15?t . [7A]

a) When is the velocity of the object greater than 21m/s?


b) When is the speed of the object less than 21m/s?


c) Illustrate the graphical representation for each ofthe above."


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