There are six books in a stack,each with a weight of 5.0 N.The coefficient of friction between all the books is 0.20 as is the coefficient between the table and the bottom book.What horizontal push must I just exceed on the next to bottom book to start sliding the top five books off the bottom one?
A)1.0 N
B)5.0 N
C)3.0 N
D)7.0 N

Question

Quizplus · Accepted Answer

The force of friction that needs to be overcome to slide the top five books is the product of the normal force (weight of the top five books, 5 books * 5.0 N = 25 N) and the coefficient of friction (0.20). Thus, the force required is 25 N * 0.20 = 5.0 N.

There Are Six Books in a Stack,each with a Weight