A plastic rod 1.8 m long ls rubbed all over with wool, and acquires a charge of 7e08 coulombs. We choose the center of the rod to be the origin of our coordinate system, with the x-axls extending to the right, the y-axis extending up, and the zaxis out of the page. In order to calculate the electric field at location A = m, we divide the rod into 8 pieces, and approximate each piece as a point charge located at the center of the piece. % II b i g . 5 A 6 f (I e 373 jzero magnitude (a) What is the length of one of these pieces? {' = 0.225 g m (b) What Is the location of the center of piece number 5? (0., 0.1125,0> m. J (c) How much charge is on piece number 5.7 (Remember that the charge is negative.) -8.75e-9 y coulombs (d) Aaproximatlng piece 5 as a point charge, what is the electric field at location A due only to piece 5? E5 =