Gujarat BoardEnglish MediumSTD 12 ScienceMathsVECTOR ALGEBRA2 Marks
Question
If the position vector of a point (-4, -3) be $\vec{\text{a}}$, find $\big|\vec{\text{a}}\big|$.
✓
Answer
Given a point (-4, -3) such that its position vector $\vec{\text{a}}$ is given by $\vec{\text{a}}=-4\hat{\text{i}}-3\hat{\text{j}}$ Then, $\big|\vec{\text{a}}\big|=\sqrt{(-4)^2+(-3)^2}$ $=\sqrt{16+9}$ $=\sqrt{25}$ $=5$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.