A rifle of mass fires a bullet of mass horizontally to the right
PHYSICS · Multi-part · CBSE · Physics · Laws of Motion · Laws of Motion
Problem
A rifle of mass 4.0kg fires a bullet of mass 20g horizontally to the right. The bullet leaves the rifle with a speed of 200ms−1 relative to the ground. The bullet experiences a uniform acceleration while inside the barrel for 0.020s. Neglect any external forces other than the interaction between the bullet and the rifle.
(i) Calculate the average force exerted by the rifle on the bullet while the bullet is in the barrel.
(ii) Write the force exerted by the bullet on the rifle, including its direction.
(iii) Using your answer to part (ii), determine the recoil acceleration of the rifle while the bullet is being fired. State its direction clearly.