A) \[21\text{ }m/s\]
B) \[24\text{ }m/s\]
C) \[26\text{ }m/s\]
D) zero
Correct Answer: A
Solution :
Velocity of the centre of mass \[{{v}_{CM}}=\frac{{{m}_{1}}{{v}_{1}}+{{m}_{2}}{{v}_{2}}}{{{m}_{1}}+{{m}_{2}}}\] \[=\frac{(150\times 20)+(30\times 25)}{150+30}\] \[=\frac{3750}{180}\] \[=21m/s\]You need to login to perform this action.
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