A 2-kg rifle is horizontally suspended by a pair of strings so that recoil can be measured.The rifle fires a 0.001-kg bullet at a speed of 200 m/s.The recoil velocity of the rifle is about

Question

Quizplus · Accepted Answer

The recoil velocity can be calculated using the conservation of momentum: (mass of bullet * velocity of bullet) = (mass of rifle * recoil velocity of rifle). Solving for the recoil velocity gives (0.001 kg * 200 m/s) / 2 kg = 0.1 m/s.

A 2-Kg Rifle Is Horizontally Suspended by a Pair of Strings