A) \[3s\]
B) \[4s\]
C) \[5s\]
D) \[6s\]
Correct Answer: C
Solution :
We have, he distance travelled by the body in the \[{{n}^{th}}\] second equal to the distance travelled by it in \['t'\] seconds,\[t=3\,\,s\] So, \[{{s}_{n}}=s\] \[\Rightarrow \]\[g\left[ n-\frac{1}{2} \right]=\frac{1}{2}g{{t}^{2}}\Rightarrow n-\frac{1}{2}=\frac{1}{2}\times {{3}^{2}}=\frac{9}{2}\] \[\Rightarrow \]\[4.5\]or\[5\]seconds
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