A) Increases
B) Decreases but does not become zero
C) Remains same
D) Become zero
Correct Answer: B
Solution :
By momentum conservation before and after collision. \[{{m}_{1}}V+{{m}_{2}}\times 0=({{m}_{1}}+{{m}_{2}})v\] Þ \[v=\frac{{{m}_{1}}}{{{m}_{1}}+{{m}_{2}}}V\] i.e. Velocity of system is less than V.
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