A) 8 m
B) 2 m
C) 4 m
D) 6 m
Correct Answer: A
Solution :
\[S\propto {{u}^{2}}\] \[\therefore \] \[\frac{{{S}_{1}}}{{{S}_{2}}}={{\left( \frac{{{u}_{1}}}{{{u}_{2}}} \right)}^{2}}\]Þ \[\frac{2}{{{S}_{2}}}=\frac{1}{4}\Rightarrow {{S}_{2}}=8\ m\]
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