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Physics 14 Online
OpenStudy (anonymous):

the tracks of a railroad make an angle of 5.20(degrees) with the horizontal. the track becomes coated with grease and a train coming down the slope tried to stop. the train wheels slide on the grease and the train accelerated down the track at a rate of .0220m/s(squared). what is the coefficient of kinetic friction between the track and the train?

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