A) 80 m
B) 60 m
C) 40 m
D) 20 m
Correct Answer: D
Solution :
\[u=20\text{ }m/s\] \[v=0\] \[h=?\] \[\text{g}=10\text{ }m/{{s}^{2}}\] We know \[{{v}^{2}}{{u}^{2}}=2gh\] \[{{0}^{2}}={{20}^{2}}=2(9.8)h\] \[h=\frac{20\times 20}{2\times 10}=20\,m\]You need to login to perform this action.
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