A) 4 km/h
B) 1 km/h
C) 2 km/h
D) 3 km/h
Correct Answer: B
Solution :
From conservation of momentum \[m\times 3=(m+2m){{v}_{1}}\] so, \[{{v}_{1}}=1\,\,km\text{/}h\]You need to login to perform this action.
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