Please help me with this physics question I have a test

Science
Tutor: None Selected Time limit: 1 Day

 A 55-kg box rests on a horizontal surface. The coefficient of static friction between the box and the surface is 0.30. A 140-N force is applied to the box. What is the frictional force on the box?  

May 14th, 2015

140 N... idk how to do it. i just googled it 

May 14th, 2015

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May 14th, 2015
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May 14th, 2015
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