A 0.09 kg bullet is fired from a 64 kg rifle with a muzzle speed of 300 m/s. What is the speed of the rifle recoil?

Question

anonymous · Answer

that one heavy rifle!

anonymous · Answer

the bullet's not so small either

anonymous · Answer

just a problem given by prof -_-

anonymous · Answer

solution is conservation of momentum ie the momentum of the discharged bullet is equal to the momentum of the rifle. right??

ghazi · Answer

under ideal conditions you are supposed to obey conservation of linear momentum so based on that , momentum of bullet = momentum of rifle due to recoil speed $$0.09*300=64*v$$ therefore $$v=\frac{ 0.09*300 }{ 64 } m/s$$