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Old Oct 7th 2019, 03:01 PM   #1
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Electric fields

An electron moving to the right at 0.01c enters a uniform electric field. If the electron is to be brought to
rest in a space of 4.0 cm, what is the direction and strength of the electric field?

I've tried solving using initial energy, the resulting field strength seamed very small, any pointers?

heres a photo of my attempt:

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Old Oct 8th 2019, 02:30 AM   #2
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You forgot to square your speed of light.
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