There are six books in a stack, and each book weighs 5 N. The coefficient of static friction between the books is 0.2. With what horizontal force must one push to start sliding the top five books off the bottom one? Help how do i do this?????

Question

a)1 N
b)5 N
c)3 N
d)7 N

Answer 1

5 books weigh 25 N
25*.2 = 5

Answer 2

Thank you:)