How to Approach Conservative Force Problems on the XY-Plane?

[Kevii]

Homework Statement

[PLAIN]http://img293.imageshack.us/img293/9080/omgay.jpg

Homework Equations

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The Attempt at a Solution

?? I'm already lost at where to begin.

 

[fizzynoob]

a) to find the magnitude you take the square root of the sum of the squared components
b) show that the angle between those vectors is 90 ( θ = cos-1 ( A dot B ) / ( |A|*|B| ) )
c) work is equal to the integral of F dot ds
d) what do you think?

 

[Kevii]

Thanks for the help, but I'm much much much more behind than that. For some reason the setup of this problem confuses me too much. I guess I'll leave it behind; I can't even understand how to find the components