EXAMPLE 5 An electron is traveling in the positive x-direction with speed vo = 107 m/s. When it passes x = 0, a horizontal electric field E = 100xi (in newtons per coulomb) is turned on. Find the electron's velocity after it has traveled 2 m (see Figure 9). Assume that qe/me = -1.76 · 1011 C/kg, where me and qe are the mass and charge of the electron, respectively. Electron Vo FIGURE 9 An electron moving in an electric field.

EXAMPLE 5 An electron is traveling in the positive x-direction with speed vo = 107 m/s. When it passes x = 0, a horizontal electric field E = 100xi (in newtons per coulomb) is turned on. Find the electron's velocity after it has traveled 2 m (see Figure 9). Assume that qe/me = -1.76 · 1011 C/kg, where me and qe are the mass and charge of the electron, respectively. Electron Vo FIGURE 9 An electron moving in an electric field.

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