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The position of a particle is given by, ...

The position of a particle is given by,
`vecr = (3.0t hati -2.0t^2 hatj + 4.0 hatk)m`
where t is in seconds and the coefficients have the proper units for r to be in metres.
What is the magnitude and direction of velocity of the particle at t = 2.0 s ?

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