A) \[-0.25\,\,m\,\,{{s}^{-1}}\]
B) \[2.5\,\,m\,\,{{s}^{-1}}\]
C) \[25\,\,m\,\,{{s}^{-1}}\]
D) \[250\,\,m\,\,{{s}^{-1}}\]
Correct Answer: A
Solution :
Initial momentum\[=0\] Final momentum\[=(0.02\times 100)+8\times v\] According to the law of conservation of momentum, \[(0.02\times 100)+8v=0\], \[8v=-2\] \[v=-\frac{1}{4}m{{s}^{-1}}=-0.25\,\,m\,\,{{s}^{-1}}\]You need to login to perform this action.
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