Calculating Electric Field from Force on a Charge

[phy43]

Homework Statement

A 4C charge experiences 45i of force. What is the electric field at the charge?

Homework Equations

F=qE --> E=F/q

The Attempt at a Solution

Q=4
F=45i 0j

I don't really know how to find the actual force from this component without an angle or anything.

E=45/4 = 11.25.. this is the wrong answer

 

[Delphi51]

It looks right to me. What does the "i" mean in "45i"? If it means the x direction, then you may need an "i" on the 11.25, too.

 

[phy43]

i is the x-component and for some reason the answer is 14i N/C, but i don't know why

 

[Delphi51]

Check the 4 C and the 45 N; if they are correct then your answer is correct and the 14 is wrong. It should be reported to whoever marks your work.