本题目来源于试卷: gc physics textbook chapter 3 problems，类别为 IB数学
[问答题]
$\text { Show that the vector labeled "incorrect" in Fig. 3-6c is actually the difference of the two vectors. Is it }\\
\overrightarrow{\mathbf{v}}_{2}-\overrightarrow{\mathbf{v}}_{1} \text {, or } \overrightarrow{\mathbf{v}}_{\mathbf{1}}-\overrightarrow{\mathbf{v}}_{\mathbf{2}} ?$
参考答案: Label the "INCORRECT" vector as vector $\overrightarrow{\mathbf{X}}$ . Then Fig. 3-6 (c) illustrates the relationship $\overrightarrow{\mathbf{V}}_{1}+\overrightarrow{\mathbf{X}}=\overrightarrow{\mathbf{V}}_{2}$ via the tail-to-tip method. Thus $\overrightarrow{\mathbf{X}}=\overrightarrow{\mathbf{V}}_{2}-\overrightarrow{\mathbf{V}}_{1}$ .
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