The position of an electron is given by r 30 t i -40 t2 j


The position of an electron is given by r = (3.0) t i + (-4.0) t2 j+ (4.0) k. What is v(t) for the electron? What is its distance from the origin at t = 2.2 s?

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Physics: The position of an electron is given by r 30 t i -40 t2 j
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