A proton is traveling horizontally to the right at 45 x 106, Ask an Expert

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A Proton is traveling horizontally to the right at 4.5 x 10⁶ m/s.

(a) Obtain the magnitude and direction of the weakest electric field that can bring the proton uniformly to rest over a distance of 3.2 cm.

(b) Find how much time does it take the proton to stop after entering the field?

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