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April 21, 2014

Homework Help: physics

Posted by sophie on Wednesday, May 16, 2012 at 1:34am.

A large 63.0kg board is propped at a 44 degree angle against the edge of a barn door that is 2.5 m wide.
How great a horizontal force must a person behind the door exert (at the edge) in order to open it? Assume that the coefficient of friction between the board and the door is 0.44, and that the board is firmly set against the ground.

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