Physics

Problem

A pistol of mass 4.0 kg fires a bullet of mass 20 g horizontally with a speed of 500 m s⁻¹. Calculate the magnitude of the pistol’s recoil speed. a)

5.0\ \text{m s}^{-1}

2.5\ \text{m s}^{-1}

1.25\ \text{m s}^{-1}

25\ \text{m s}^{-1}