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OpenStudy (anonymous):
Friction: The force of friction between an object and the surface upon which it is sliding is 126N and the coefficient of friction between them is 0.20. What is the mass of the object?
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OpenStudy (homeworksucks):
First, find the normal force, given that \[F_{friction}=\mu F_n\]
OpenStudy (homeworksucks):
And remember that Fn is mg (or technically -mg if you're using -9.81
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