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