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Converting Coordinate Systems: Exploring the Force on a Semicircular Conductor
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[QUOTE="pobro44, post: 6019580, member: 646832"] Thank you for all your answers. I believe I get it. I can't take radial unit vector outside the integral, cause it changes around path of integration, and it is obvious that it depends on the angle once I convert it to cartesian coordinates. Only cartesian unit vectors are safe to put in front of integral. Also, while the force is radial on every point of integration path, net force being radial is meaningless, just as although infitesimal part of area vector of a sphere is radial it would make little sense for area of whole sphere to be. [/QUOTE]
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Converting Coordinate Systems: Exploring the Force on a Semicircular Conductor
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