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## Homework Statement

electron starting from rest and moving with constant acceleration travels 4.7cm in 8.2ms. What is the magnitude of this acceleration? Answer in km/s^2

## Homework Equations

X=Xi + (Vi)t + 1/2at^2

## The Attempt at a Solution

Vi = 0 so the equation becomes X = Xi + 1/2at^2

t = 8.2ms and X = 4.7 so 4.7 = Xi + 1/2a(8.2)^2

I feel like I did everything right up to this point but all I need is acceleration to plug in but I'm not sure how to get that.

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