The coefficient of static friction between two blocks is and the table is smooth. The maximum horizontal force that can be applied to move the blocks together is _______ (take

The coefficient of static friction between two blocks is and the table is smooth. The maximum horizontal force that can be applied to move the blocks together is _______ (take

For with relative rest, between
must be maximum.

Asked in: JEE Main 2021 (26 Aug Shift 2)