Line Integral: Evaluating Along Circular Path from P1 to P2

[Cryphonus]

Homework Statement

Evaluate the line integral along the segment P₁(0,3) to P₂(-3,0) of the circular path shown in figure.

Figure basically shows a circle with a radius of 3. The part that i have to evaluate is from the y-axis (P₁) to the x-axis (P₂), basically a quarter of the circle.

Homework Equations

integral from P1 to P2 of E.dl

The Attempt at a Solution

I just can't write the equation to begin with.

i would be glad if you can give me some hints about the equation that i have to integrate, thanks a lot!

 

[LCKurtz]

Homework Statement

Evaluate the line integral along the segment P₁(0,3) to P₂(-3,0) of the circular path shown in figure.

Figure basically shows a circle with a radius of 3. The part that i have to evaluate is from the y-axis (P₁) to the x-axis (P₂), basically a quarter of the circle.

Homework Equations

integral from P1 to P2 of E.dl

The Attempt at a Solution

I just can't write the equation to begin with.

i would be glad if you can give me some hints about the equation that i have to integrate, thanks a lot!

I'm afraid there aren't any mind readers here. If you can't write down the equation you need help with, how are we to help you figure out how to work it?

 

[Cryphonus]

oh sorry i thought it was there E= (x) x - (y) y variables in the paranthesis refers to the direction. i still need to express dl somehow.