Electricffiledcalcuate escape speed

[seto6]

electricffiled..calcuate escape speed! urgent please help

Homework Statement

Homework Equations

ke=1/2mv^2
Ue=Eqs
E=kq/r^2

The Attempt at a Solution

Uf+kf=Ki+Ui

Uf=0 and Kf=0

so -Ui=Ki
Eqs=1/2(mv^2)

v=(sEqs/m)^1/2 after this no clue i got lost help please

 

[seto6]

sry guys is the answer 2.3x10^6m/s

 

[ehild]

Yes, it is.

ehild