A) 0
B) \[g/4\]
C) \[g/2\]
D) \[-g/2\]
Correct Answer: B
Solution :
\[{{a}_{cm}}={{\left( \frac{{{m}_{1}}-{{m}_{2}}}{{{m}_{1}}+{{m}_{2}}} \right)}^{2}}\ g={{\left( \frac{3m-m}{3m+m} \right)}^{2}}g=\frac{g}{4}\]
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