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#Engineering

Consider a uniform cubical box of side a on a rough floor that is to be moved by applying minimum possible force F at a point b above its centre of mass (see figure). If the coefficient of friction is $\mu =0.4$ , the maximum possible value of $100\times \frac{b}{a}$ for box npt to topple before moving is
Option: 1 50
Option: 2 40
Option: 3 30
Option: 4 60

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