physics
posted by teamjakeward .
please help
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?
please walk me through this

force friction between books= mu*mg
= .2*5*5=2.5N 
thanks alot:D
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