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

question 8

Multiple Choice

There are nine books in a stack,each with a weight of 6 N.The coefficient of friction between all the books is 0.3 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 eight books off the bottom one?

• A)1.80 N
• B)14.4 N
• C)48.0 N
• D)16.2 N

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