PROBLEM: A train with a total mass 2.20E+6kg rises 600m as it travels a distance of 53.0km along a steady slope at a constant speed of 10.0km/hr. The frictional force on the train is 1.400 percent of the weight. Find the kinetic energy of the train. I did this using K=.5*m*vsquared and got 8501240. It then asks: Find the energy dissipated by kinetic friction. and Find the power output of the train engines. I am unsure as to how to find the energy dissipated by kinetic friction. I thought it involved using fk = muk * N where Mu is the coefficient of friction and N is the normal force. Yet, I could not seem to find the answer. For the power I tried using P= .5 m Vsquared / t. And finding t from the information given but this also did not work. Thanks for helping!