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## Homework Statement

An electron with initial velocity Vo = 2.3e5 m/s enters a region 1.0 cm long where it is electrically accelerated. It emerges with velocity v = 4.10e6 m/s. What was its acceleration, assumed constant?

_________ m/s^2

## Homework Equations

DeltaX = 1/2 (Vo + V)t

V = Vo +at

## The Attempt at a Solution

I thought these were my known variables:

Vo = 2.3e5 m/s

DeltaX = 1.0 cm

Vf = 4.10e6 m/s

I tried to solve for t using DeltX equation. I got 4e-9 s. Then I tried to solve for a using my new value for t and V equation. I got 9.675e14 m/s^2 which is wrong. So anyone know what happened?