Question: An electron's position is given by r = 3.00ti 4.00t 2 j + 2.00k, with t in seconds and r in meters. (a) In

An electron's position is given by r = 3.00ti – 4.00t2j + 2.00k, with t in seconds and r in meters. 

(a) In unit vector notation, what is the electron's velocity v (t)? At t = 2.00 s, what is v 

(b) In unit-vector notation and as 

(c) A magnitude and 

(d) An angle relative to the positive direction of the x axis?

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