Question

Sean (mass 80 kg) fires a twelve gauge 00 buckshoot which has a mass of 510g. His shot-gun has a mass of 5 kg. The muzzle velocity is 347 m.s-1. With what velocity does Sean (and his gun) recoil

Answer 1

$M_1V_1=M_2V_2$

Therefore:

$(80+0.51kgs)V=5\times 347$

$80.51V=1735$

Recoil velocity $V=21.55m/s$