(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

An object moves according to this : r(t)= (1+t^2)i + (1-t)j + (t+t^3)k

How fast does it moves far from O(0,0) for t=1?

Is this velocity the same with the object's velocity?

3. The attempt at a solution

I cant understand the second part

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# Homework Help: Velocity and vector calculus

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