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2.14: (a) The displacement vector is: EMBED Equation.3 The velocity vector is the time derivative of the displacement vector: EMBED Equation.3 and the acceleration vector is the time derivative of the velocity vector: EMBED Equation.3 At t = 5.0 s: EMBED Equation.3 EMBED Equation.3 EMBED Equation.3 EMBED Equation.3 (b) The velocity in both the x- and the y-directions is constant and nonzero; thus the overall velocity can never be zero. (c) The object's acceleration is constant, since t does not appear in the acceleration vector.

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