Physics

Problem

A gun of mass

5\,\text{kg}

fires a

0.02\,\text{kg}

bullet with a velocity of

400\,\text{m/s}

relative to the ground. Neglecting external forces, the recoil speed of the gun is a)

40\,\text{m/s}

0.16\,\text{m/s}

1.6\,\text{m/s}

8.0\,\text{m/s}