Example 1 · difficulty 2/5
A rifle of mass 4 kg fires a bullet of mass 0.020 kg with a speed of 200 m/s relative to the ground. The rifle and bullet were initially at rest. What is the recoil velocity of the rifle?
- A. 0.5 m/s backward
- B. 1.0 m/s backward
- C. 1.0 m/s forward
- D. 4.0 m/s backward