A) \[140\,N\]
B) \[70\,N\]
C) \[40\,N\]
D) \[100\,N\]
Correct Answer: A
Solution :
Free body diagram, For body of mass 5kg \[F-5g-T=5a\] \[F=5a+5g+T\] \[=5a+50+40=5a+90\] \[F=5a+90\] ?(i) Now for body of mass 2kg \[T-2g=2a\] \[\frac{40-20}{a}=a\] \[a=10m/{{s}^{2}}\] ?..(ii) From equations (i) and (ii), we get \[F=140\,m\]You need to login to perform this action.
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