A) 70 m/s
B) 140 m/s
C) 210 m/s
D) 280 m/s
Correct Answer: D
Solution :
Final velocity,\[v=\sqrt{2gh}\] \[=\sqrt{2\times 9.8\times 0.1}=1.4\,\,m/s\] From conservation of momentum, \[0.01\,\,v+0=(2+0.01)\times 1.4\] \[\therefore \] \[u=201\times 1.4]=281.4\] \[\approx \mathbf{280}\,\,\mathbf{m/s}\].You need to login to perform this action.
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