Consider 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 
, the maximum possible value of 
for box not to topple before moving is
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(50) JEE Main 2020
For no toppling
(in limiting case)
But it is not possible as b can maximum be equal to 
a only
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