A bullet is fired horizontally from a rifle that is initially at rest

PHYSICS · Subjective · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

0.010\,\text{kg}

bullet is fired horizontally from a

2.0\,\text{kg}

rifle that is initially at rest. The bullet leaves the barrel with a speed of

400\,\text{m/s}

relative to Earth. Determine the magnitude of the rifle’s recoil speed immediately after the bullet is fired.