An electron with a speed of 2.0 × 10^6 m/s moves into a uniform electric field of 550 N/C that is parallel to the electron's motion. How long does it take to bring the electron to rest? (me = 9.11 × 10^?31 kg, e = 1.6 × 10^?19 C)
a. 2.1E–8 s
b. 6.4E–9 s
c. 1.6E–6 s
d. 1.6E–6 s
e. 3.1E–7 s
a
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