本题目来源于试卷: gc physics textbook chapter 3 problems，类别为 IB物理学
[问答题]
Can the magnitude of at3f )1vtlez3h-u/x y9t )exlj 6 -vkqg vector ever (a) be equal to one ofv+c;+ jm+alvqzt, b g* its components, or (b) be le+z+v, ;+ga*j vtmqlcbss than one of its components?
参考答案: (a) The magnitude of a vector can equal the length of one of its components if the other components of the vector are all 0; i.e. if the vector lies along one of the coordinate axes. (b) The magnitude of a vector can never be less than one of its components, because each component contributes a positive amount to the overall magnitude, through the Pythagorean relationship. The square root of a sum of squares is never less than the absolute value of any individual term.
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