Physics

Problem

6\,\text{kg}

gun at rest on a smooth horizontal platform fires a

0.06\,\text{kg}

bullet with a speed of

500\,\text{m\,s}^{-1}

relative to the ground. Immediately after the bullet leaves, the gun experiences a constant horizontal resistive force of

24\,\text{N}

from the platform bearings. What is the speed of the gun

0.50\,\text{s}

after the shot, assuming the resistive force acts only after the bullet has completely left the barrel? a)

4\,\text{m\,s}^{-1}

3\,\text{m\,s}^{-1}

2\,\text{m\,s}^{-1}

5\,\text{m\,s}^{-1}