Question

Tony (of mass 75 kg) coasts on his bicycle (of mass 15 kg) at a constant speed of 4 m/s,carrying a 14 kg pack. Tony throws his pack forward, in the direction of his motion, at 6 m/s relative to the speed of bicycle just
before the throw.What is the initial momentum of the system(Tony, the bicycle, and the pack)?
Answer in units of kg ยท m/s

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