A) \[4.9\,m/{{s}^{2}}\]
B) \[2.45\,m/{{s}^{2}}\]
C) \[1.4\,m/{{s}^{2}}\]
D) \[9.5\,m/{{s}^{2}}\]
Correct Answer: C
Solution :
Acceleration\[=\frac{({{m}_{2}}-{{m}_{1}})}{({{m}_{2}}+{{m}_{1}})}g\] \[=\frac{4-3}{4+3}\times 9.8=\frac{9.8}{7}=1.4\,m/{{\sec }^{2}}\]
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