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LionLieOn

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## Homework Statement

An electron is fired at 4.0x10^6 m/s horizontally between the parallel plates as shown, (see attachment) starting at the negative plate. The electron deflects downwards and strikes the bottom plate. The magnitude of the electric field between the plates is 4.0 x10^2 N/C. The separation of the plates is 2.0 cm

A) find the acceleration of the electron

b) find the horizontal distance traveled by the electron when it hits the plate

c) find the velocity of the electron as it strikes the plate

## Homework Equations

## The Attempt at a Solution

Please see attachments for answers A and B.

I'm having trouble with question C.

I'm using the equation, " V2^2 = V1^2 + 2a (d) " to find V2 however, I'm not too sure which "d" I should use, the distance between the 2 plates (2.0cm) or the distance I found for question B. Can someone give me an explanation as to which one I need to use and why?

Or am I using the wrong formula/ Approaching the question wrong ?

#### Attachments

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