A rifle of mass is initially at rest on a smooth horizontal track
PHYSICS · Multi-part · CBSE · Physics · Laws of Motion · Laws of Motion
Problem
A rifle of mass 4.0kg is initially at rest on a smooth horizontal track. It fires a single bullet of mass 0.020kg with a muzzle speed of 500ms−1 relative to the rifle. Neglect any external horizontal forces acting on the system.
(i) Calculate the recoil velocity of the rifle just after the bullet leaves the barrel.
(ii) Determine the kinetic energy gained by the rifle due to the recoil.
(iii) Find the percentage of the total kinetic energy of the system that is carried by the bullet.