A) \[49\,m/{{s}^{2}}\]
B) \[5.44\,m/{{s}^{2}}\]
C) \[19.5\,m/{{s}^{2}}\]
D) \[2.72\,m/{{s}^{2}}\]
Correct Answer: B
Solution :
\[a=\frac{{{m}_{2}}}{{{m}_{1}}+{{m}_{2}}}\times g=\frac{5}{4+5}\times 9.8=\frac{49}{9}=5.44\ m/{{s}^{2}}\]
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