# Physics

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A piece of wood with mass m = 2.7 kg is held in a vise sandwiched between two wooden jaws as shown in the figure below. A blow from a hammer drives a nail which exerts a force of 460 N on the wood. If the coefficient of static friction between the wood surfaces is 0.61, what minimum normal force must each jaw of the vise exert on the wood block to hold the block in place?

• Physics -

F=2•F(fr)+mg =2•μ•N +mg
N=(F+mg)/2• μ

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