Finding the radius of a Proton's arc inside a square.

[RelativeJosef]

Homework Statement

This is for a practice question on an exam:

I am able to finish the problem, if I could figure out how to find the radius of this arc the proton makes.

Homework Equations

I have nothing.

The Attempt at a Solution

I have tried arc length equations and just integrating the change in dx and dy, but all my answers have been nonsensical.

I have a feeling this is very simple and I wasn't paying attention enough in Geometry back in grade school.

Any help would be greatly appreciated.

 

[gneill]

Homework Statement

This is for a practice question on an exam:

I am able to finish the problem, if I could figure out how to find the radius of this arc the proton makes.

Homework Equations

I have nothing.

The Attempt at a Solution

I have tried arc length equations and just integrating the change in dx and dy, but all my answers have been nonsensical.

I have a feeling this is very simple and I wasn't paying attention enough in Geometry back in grade school.

Any help would be greatly appreciated.

Please write out the complete problem statement.
Surely the radius of the arc is trivial by inspection of the image?

 

[RelativeJosef]

Please write out the complete problem statement.
Surely the radius of the arc is trivial by inspection of the image?

I have since deduced the radius, and indeed it was trivial.

If you are interested, in calculating the required magnetic field of this square magnet to produce such a curve in a protons path through the magnetic field, the radius is simply the side length of one side of the square.