Two identical books each with k pages are placed on the table in a way that the each page of book A is between the pages of book b. The high half of book B is on top of book A.
Given that
1) the coefficient of static friction on the surface of card A is mu;
2) Each page of the book has a mass of m;
3) Book A does not move from the table.
What is the minimum amount of horizontal force applied to book B in order to pull it out of book A?