A) \[12m/{{s}^{2}}\]
B) \[~4m/{{s}^{2}}\]
C) \[10m/{{s}^{2}}\]
D) Zero
Correct Answer: B
Solution :
As the mass of 10 kg has acceleration\[12\text{ }m/{{s}^{2}}\], therefore it applies \[120N\]force on mass \[20kg\] in a backward direction. \[\therefore \] Net forward force on \[20kg\]mass \[=200-120=80N\] \[\therefore \]Acceleration \[=\frac{80}{20}=4m/{{s}^{2}}\]You need to login to perform this action.
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