A long, horizontal wire is carrying a current I. A particle Part I of mass m and charge q is fired horizontally at a speed vo. The initial velocity of the particle is parallel to the wire, and its initial position is a distance r directly below the wire, as shown in (Figure 1). What initial speed must Determine at what initial speed vo the particle will travel in a straight horizontal line. the particle have for it to travel in a straight line? Do not Express your answer in terms of some, all, or none of the variables m, q, vo, I, r, and ignore gravity. Express your answer in terms of I, m, q. the constants 9, /0, and 7. T, Ho, and the acceleration of gravity g. View Available Hint(s) Figure