A) 3
B) 4
C) 5
D) 9
Correct Answer: C
Solution :
Let\[F=x\hat{i}+y\hat{j}\] As the moment of F about A is 0, F vanquishes through point A. Also, \[3x=9\] and\[4y=16\] \[\Rightarrow \] \[x=3,\text{ }y=4\] \[\therefore \] \[|F|=\sqrt{{{x}^{2}}+{{y}^{2}}}=5\]You need to login to perform this action.
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