Question

If a particle moves from point P (2,3,5) to point Q (3,4,5). Its displacement vector be

• A. $\hat{i}+\hat{j}+10\hat{k}$
• B. $\hat{i}+\hat{j}+5\hat{k}$
• C. $\hat{i}+\hat{j}$
• D. $2\hat{i}+4\hat{j}+6\hat{k}$

Answer 1

The correct option is C

$\hat{i}+\hat{j}$

Displacement vector $\overline{r}=\Delta x\hat{i}+\Delta y\hat{j}+\Delta z\hat{k}$
$=(3-2)\hat{i}+(4-3)\hat{j}+(5-5)\hat{k}=\hat{i}+\hat{j}$.