A 5 kg rifle fires a 0.05 kg bullet at 300 m/s. The recoil speed of the rifle is:

  1. 3 m/s
  2. 30 m/s
  3. 6 m/s
  4. 1.5 m/s
Answer

A) 3 m/s

Total momentum stays zero: MV = mv Rightarrow V = 0.05 3005 = 3 m/s (backwards). SLO P-11-B-11 · Application

Physics MCQ · More Momentum and Collisions MCQs · Practise