The position r of a particle moving in an xy plane is given by r =...

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The position r of a particle moving in an xy plane is given by r =...

The position r of a particle moving in an xy plane is given by r = (3t^3 - 1t)i + (8-2t^4)j with r in meters and t in seconds. In unit-vector notation, calculate r for t=2s.

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