A proton (q = 1.6x10-19 C and m = 1.67x10-27 kg) initially moves left to right along the x-axis at a speed of 2000 m/s. It moves into an E-eld that...

8. A proton (q = 1.6x10-19 C and m = 1.67x10-27 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. 4x107

b. 3x107

c. 2x107

d. 1x107

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