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 $$bulletdmdt=$$ Mass thrown per second by the machine gun $$=$$ Mass of bullet × Number of bullet fired per second $$=10g$$×$$10$$ bullet $$/$$$$sec$$$$=100g/$$$$sec$$$$=0.1kg/$$$$sec$$∴  Thrust $$=udmdt=500$$×$$0.1=50N$$

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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