Question

What is the time it takes (in seconds) for a proton, initially at rest, to reach a speed of 0.1 c (where c is the speed of light) in a uniform electric field of 100 N/C?
a) 2.7 x 10⁻⁷ s
b) 9.0 x 10⁻⁷ s
c) 3.0 x 10⁻⁶ s
d) 1.0 x 10⁻⁵ s