MCQ
If the resultant of three forces $\vec{\text{F}}_1=\text{p}\hat{\text{i}}+3\hat{\text{j}}-\hat{\text{k}},\ \vec{\text{F}}_2=-5\hat{\text{i}}+2\hat{\text{k}},$ and $\vec{\text{F}}_3=6\hat{\text{i}}-\hat{\text{k}}$ acting on a particle has a magnitude equal to $5$ units, then the value of $p$ is:
- A$-6$
- B$-4$
- ✓$3$
- D$4$
