A) \[(2-\sqrt{2})s\]
B) \[(2+\sqrt{2})s\]
C) \[(2\pm \sqrt{2})s\]
D) 4 s
Correct Answer: B
Solution :
\[H=\frac{1}{2}g{{t}^{2}}\] ... (i) \[H-\frac{H}{2}=\frac{1}{2}g{{(t-1)}^{2}}\] or \[\frac{H}{2}=\frac{1}{2}g{{(t-1)}^{2}}\] ...(ii) (i)/(ii) \[2=\frac{{{t}^{2}}}{{{(t-1)}^{2}}}\] \[\sqrt{2}=\frac{t}{(t-1)}\Rightarrow t=2+\sqrt{2}\]You need to login to perform this action.
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