Sunday, July 12, 2009

Static and Kinetic Friction?

A 10 kg crate is at rest on a horizontal table (coefficient of static friction, mu s) =0.8, (coefficient of kinetic friction, mu k =0.3). Then various amounts of horizontal pushing force are applied to it.





a.) What is the largest pushing force that can be applied before the crate can start moving? (in Newtons)





If the horizontal pushing force was 15 N, what is:


a.) the friction force?


b.) net force on the crate?


c.) acceleration of the crate?





Please show work.

Static and Kinetic Friction?
Largest force= 10*9.8*0.8





If 15 N is pushing the crate it isn't moving


a) friction=-15N


b) Net force =0


c) Acceleration=0





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