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(a) Calculate the force applied to the proton by the field. ANSWER: 2.08E-16 N

(b) Apply Newton's second law to calculate the acceleration of the proton. (Don't be surprised if the acceleration is large. It isn't applied for a very long time.) ANSWER: 1.24E11 m/s^2

(c) Calculate the time it takes for the proton to move 1 cm in this field, starting from rest. (Hint: The acceleration is uniform.)

in part c i cannot figure out how to find the uniform acceleration.

the equation given to find the time it takes for the proton to move 1cm in this field is

x = 1/2at^2 and I'm solving for t.

0.01 m = 1/2 (Vf - Vi) t^2

0.01 m = 1/2 (1.30x10^3 - 0) t^2

but the answer i got was wrong. what am i doing wrong to find the time it takes for the proton to move 1 cm?