A proton (q = 1.6×10-19 C and m = 1.67×10-27 kg) initially m

8. A proton (q = 1.6×10-19 C and m = 1.67×10-27 kg) initially moves left to right along the x-axis at a speed of 2000 m/s. It moves into an E-field that points in the -x direction. The proton travels a distance of 0.200 m before coming to rest. Determine the acceleration (in m/s2) of the proton in the E-field.
a. 4×107
b. 3×107
c. 2×107
d. 1×107
9. Determine the E-field magnitude that produces the acceleration in question 8.
a. 0.3 N/C
b. 0.1 N/C
c. 0.7 N/C
d. 0.5 N/C