How Much Charge Moves a Block from 0.3m to 0.4m?

[getalifebaby]

Homework Statement

A block is attached to a light spring with the equilibrium point at 0.3 m. Then a small charge is applied such that the block move to 0.4. What is the magnitude of the charge?

Homework Equations

The Attempt at a Solution

So displacement is .1m

I have no idea what to do...

Please Help!

 

[jyothsna pb]

i think the data is insufficient