A rifle has a mass of 4.73 kg and it fires a bullet of mass 13.6 g at a muzzle speed of 829 m/s. What is the recoil speed of the rifle as the bullet leaves the gun barrel?

So far, I've got (using p for momentum) p=p, so massXchange in velocity of the bullet will will equal the massXchange in velocity of the rifle. So my work looks like:
.136kg x 829m/s = 4.73kg x v

Which gives me 23.8m/s, which is incorrect. What am I doing wrong?

6 answers

For speed, it is correct. If it were asking for velocity, I would add a negative sign, meaning the opposite direction from the bullet.
I've tried that, but the program I'm using still says that that is incorrect.
The program is incorrect. Put a hex on it.
is there .136kg for 13.6g.....check that
13.6g is 0.0136kg
2.09m/s
Similar Questions
  1. This is an ”explosion” question.A 30-06 caliber hunting rifle fires a bullet of mass 0.0164 kg with a velocity of 254 m/s
    1. answers icon 1 answer
  2. A 30-06 caliber hunting rifle fires a bullet ofmass 0.0118 kg with a velocity of 505 m/s to the right. The rifle has a mass of
    1. answers icon 2 answers
  3. A 30-06 caliber hunting rifle fires a bullet ofmass 0.0101 kg with a velocity of 279 m/s to the right. The rifle has a mass of
    1. answers icon 0 answers
  4. A 30-06 caliber hunting rifle fires a bullet ofmass 0.00829 kg with a velocity of 662 m/s to the right. The rifle has a mass of
    1. answers icon 1 answer
more similar questions