Homework Help: physics

Posted by kacey on Thursday, August 9, 2012 at 11:19am.

You can keep a 3 kg book from dropping by pushing it horizontally against a wall. What force must you apply to the book to keep it from falling? What is the coefficient of static friction?

physics - Elena, Thursday, August 9, 2012 at 2:06pm
x: F= N
y: mg=F(fr)

mg=F(fr) =μ•N= μ•F
F=mg/ μ

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