Answer :
The top five books must be pushed off the bottom one with 5 N of horizontal force.
The word "force" has a specific meaning in science. At this level, calling a force a push or a pull is entirely appropriate. A force is not something an object "has in it" or that it "contains." One thing experiences a force from another. Each of the six books weighs five pounds, therefore we need to slide five of them.
them, where 55 = 25N
The following formula can then be used to get the friction force.
F = N μ
where F is the frictional force, N is the force, and is the static friction coefficient
F= (25 N) (0.2) (0.2)
F= 5 N
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