A) 100 m/sec
B) 400 m/sec
C) 550 m/sec
D) 700 m/sec
Correct Answer: D
Solution :
\[t=\frac{R}{u}=\frac{100}{u}\] \[h=\frac{1}{2}g{{t}^{2}}=\frac{9.8\times 100\times 100}{2{{u}^{2}}}\] \[\Rightarrow \] \[{{u}^{2}}=\frac{9.8\times {{(100)}^{2}}}{2\times 0.1}=490000\] \[\Rightarrow \] \[u=700\,\,m/\sec \]You need to login to perform this action.
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