A machine gun is mounted on a $$2000$$ kg car on a horizontal frictionless surface. At some instant the gun fires bullets of mass $$10$$ gm with a velocity of $$500$$ $$m/$$$$sec$$ with respect to the car. The number of bullets fired per second is ten. The average thrust on the system is

Question

Infinity Learn · Accepted Answer

u $$=$$ velocity of bullet $$=$$ $$500$$ $$m/sdmdt=$$ Mass thrown per second by the machine $$gun=$$ Mass of bullet ×Number of bullet fired per $$second=$$ $$10$$ g × $$10$$ $$bullet/$$$$sec$$ $$=$$ $$100$$ $$g/$$$$sec$$ $$=$$ $$0.1$$ $$kg/secThrust$$ $$=$$ u dmdt $$=$$ $$500$$ × $$0.1$$ $$=$$ $$50$$ N

A machine gun is mounted on a 2000 kg car on a horizontal frictionless surface. At some instant the gun fires bullets of mass 10 gm with a velocity of 500 m/sec with respect to the car. The number of bullets fired per second is ten. The average thrust on the system is

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