A biomechanics forensics expert is attempting to determine the events that led to an automobile accident in which one car rear-ended another. The two cars were originally travelling in the same direction. Car A was traveling at a speed of 42 km/hr when it was struck by Car B, which was traveling at 65 km/hr. Following the collision, the two cars became entangled and continued to travel as one unit with a speed of 53 km/hr. From an interview with the driver of Car A, the forensics expert learned that the mass of Car A is 575 kg. What is the mass of Car B (in kg)?
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