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## Homework Statement

In the figure below, a charged particle (either an electron or a proton) is moving rightward between two parallel charged plates separated by distance d = 2.30 mm. The particle is speeding up from an initial speed of 3640 km/s at the left plate.

## Homework Equations

The equation that I was given to use (The one my professor worked out on the board) is:

W(cons)=-ΔV=ΔK=-(-e)(ΔV)=1/2 m(particle)(Vf

^{2}-Vi

^{2})

The first part of the problem was to find out if the particle was an electron or a proton. It is an electron.

## The Attempt at a Solution

1/2 (9.1*10

^{-31})*3640

^{2}= 6.02*10

^{-24}

This was not correct.