A coal car of mass m1 = 4296 kg is rolling down the tracks at a velocity of vi = 2.1 m/s when a loader drops a load of coal m2= 6713 kg into the car. m1 = 4296 kg m2 = 6713 kg vi = 2.1 m/s 1) What is the momentum of the system in (kg⋅m)/s before the coal is added? P = 2) What is the velocity after the coal is added in meters per second? vf = 3) If you measured the final velocity of the car to be 1 m/s and the initial mass of the car remains the same, how much coal was added to the car in kg?

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