a rifle is used during the biathlon event in the olympics. the rifle has a mass of 2.5kg and the bullet has a mass of .02kg after the is shot, the bullet travels at a speed of 525 m/s. what is the total momentum of the rigle-bullet system before the bullet is shot ?

Question

abhisar · Answer

Do you know the Principal of conservation of momentum ?

anonymous · Answer

no, can you help me with that question ? please @Abhisar

abhisar · Answer

The principal says that the total momentum of rifle-bullet system before the rifle is fired is same after it is fired.

anonymous · Answer

a) 1323 kg m/s
b) 1313 
c) okg
d) 10.5 
 those are the options, wouldnt be B?

abhisar · Answer

what is that 3rd option ?

abhisar · Answer

is it 0 ?

anonymous · Answer

third option is 0 im sorry

abhisar · Answer

Total momentum of the system is equal to

$\large\sf Mass_{rifle}\times Velocity_{rifle} + Mass_{bullet}\times Velocity_{bullet}$

abhisar · Answer

Since before the bullet was shot, velocity of both rifle and bullet was 0. So the answer will be 0

anonymous · Answer

oh okay thanks ! i get it i think..

abhisar · Answer

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