A proton is traveling horizontally to the right at 4.00106 m/s.Find (a)the magnitude and (b) direction of the weakest electric field that can bring…

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A proton is traveling horizontally to the right at 4.00×106 m/s.Find (a)the magnitude and (b) direction of the weakest electric field that can bring the proton uniformly to rest over a distance of 3.10 cm.