A) 8 s
B) 1 s
C) 2 s
D) 4 s
Correct Answer: C
Solution :
| [c] \[\int\limits_{v}^{0}{\frac{d\upsilon }{\sqrt{\upsilon }}=-\int\limits_{0}^{t}{2.5\,dt}}\] |
| \[2\sqrt{\upsilon }=2.5\,t\] |
| \[2\sqrt{6.25}=2.5\,t\] |
| \[t=2\,s\] |
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