Multiple Choice
A machine gun is attached to a railroad flatcar that rolls with negligible friction.If the railroad car has a mass of 6.25 × 104 kg,how many bullets of mass 25 g would have to be fired at 250 m/s off the back to give the railroad car a forward velocity of 0.3 m/s?
A) 400
B) 2000
C) 3000
D) 5000
Correct Answer:
Verified
Correct Answer:
Verified
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