Question: An ion's position vector is initially r = 5.0i 6.0j + 2.0k, and 10 s later it is r = 2.0i + 8.0j

An ion's position vector is initially r = 5.0i – 6.0j + 2.0k, and 10 s later it is r = –2.0i + 8.0j – 2.0k, all in meters. In unit-vector notation, what is its v_avg during the 10s?

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