A) \[\left( {{m}_{1}}-{{m}_{2}} \right)g~\]
B) \[\left( {{m}_{1}}-\text{ }{{m}_{2}} \right)\,\frac{g}{2}\]
C) \[\left( {{m}_{1}}+{{m}_{2}} \right)g\]
D) \[\left( {{m}_{1}}+{{m}_{2}} \right)\,\frac{g}{2}\]
Correct Answer: B
Solution :
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