A woman was seriously injured Thursday when her motorcycle collided with a car in Hudson.Police said a motorcycle driven by Beth Hudson, 57, of Hudson, crossed the center line on Sullivan Road and crashed head-on into a car driven by Joyce Gormley, 65, of Windham.Hudson was seriously injured and flown to Massachusetts General Hospital. Gormley suffered minor injuries and was taken to Southern New Hampshire Medical Center.Police said the crash is under investigation.