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In an ink-jet printer, drops of ink are given a certain amount of charge before they move between two large parallel plates. The purpose of the plates is to deflect the charges so that they are stopped by a gutter and do not reach the paper. The plates are d = 1.5 cm long and have an electric field of E = 1.2 x 106 N/C between them. Drops with a mass m = 0.14 ng, and a charge q = 1.0 x 10-16 C, are moving horizontally at a speed, v = 24 m/s, parallel to the plates. What is the vertical displacement of the drops when they leave the plates? To answer this question, go through the following steps.
(a) What is the vertical force on the drops?
(b) What is their vertical acceleration?
(c) How long are they between the plates?
(d) How far are they displaced?
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