A) 40
B) 100
C) 25
D) 50
Correct Answer: D
Solution :
| [d] \[\vec{r}=15{{t}^{2}}\hat{i}+(4-20{{t}^{2}})\hat{j}\] |
| \[\text{\vec{v}}=\frac{d\vec{r}}{dt}=30t\hat{i}+(-40\,t)\hat{j}\] |
| \[\vec{a}=\frac{d\text{\vec{v}}}{dt}=30\hat{i}-40\,t\hat{j}\] |
| \[\left| {\vec{a}} \right|=50m/{{s}^{2}}.\] |
You need to login to perform this action.
You will be redirected in
3 sec
