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12. Given r = 2.5 cos(20 t) i + 7.0 to j - 0.55 k, find: a) The initial position b) The velocity as a

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12. Given r = 2.5 cos(20 t) i + 7.0 to j - 0.55 k, find: a) The initial position b) The velocity as a function of time c) The initial velocity d) The acceleration as a function of time e) The initial direction of motion (+ or neg in all directions; x, y, z). Explain. f) The jerk as a function of time

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