Physics Chapter 4 Assessment

What is the coefficient of kinetic friction if a force of 76 N is applied to keep a 66.9 kg body in motion, on a flat surface, when the force is applied at an angle of 15º? An object with a mass of 123 kg has its initial velocity of 2.5 m/s changed to 28.8 m/s over a period of 2.4 minutes. ................
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