# The position vector of a particle is given by r=3t2i+4t2j+7k find the displacement after 10 second?

Jul 31, 2018

• $= 300 \boldsymbol{i} + 400 \boldsymbol{j} + 7 \boldsymbol{k}$
• $\boldsymbol{r} \left(t\right) = 3 {t}^{2} \boldsymbol{i} + 4 {t}^{2} \boldsymbol{j} + 7 \boldsymbol{k}$
$\therefore \boldsymbol{r} \left(10\right) = 3 \left(100\right) \boldsymbol{i} + 4 \left(100\right) \boldsymbol{j} + 7 \boldsymbol{k} = 300 \boldsymbol{i} + 400 \boldsymbol{j} + 7 \boldsymbol{k}$