일반물리학 2 — Electric Fields: Problem 38

38 An electron enters a region of uniform electric field with an initial velocity of 30 km/s in the same direction as the electric field, which has magnitude \(E = 50 \text{ N/C}\). (a) What is the speed of the electron 1.5 ns after entering this region? (b) How far does the electron travel during the 1.5 ns interval?