A gun of mass fires a bullet with a velocity of relative to the ground

PHYSICS · Single correct · AP · Physics 1: Algebra-based · Linear Momentum · Linear Momentum

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}

(b)

0.16\,\text{m/s}

(c)

1.6\,\text{m/s}

(d)

8.0\,\text{m/s}