# A proton is traveling horizontally to the right at 4.20×10^6m/s. Part A:Find (a)the magnitude and (b) direction of the...

###### Question:

A proton is traveling horizontally to the right at 4.20×10^6m/s.
Part A:Find (a)the magnitude and (b) direction of the weakest electric field that can bring the proton uniformly to rest over a distance of 3.50cm.

Part B: counterclockwise from the left direction

Part C:How much time does it take the proton to stop after entering the field?

Part D:What minimum field ((a)magnitude and (b)direction) would be needed to stop an electron under the conditions of part (a)?