A beg (mass M) hangs by a long thred and a bullet (mass m) comes horizontally with velocity v and gets caught in the bag. The for the combined (bag+bullet) system -

A bag P (mass M) hangs by a long thread and bullet (mass m) comes horizontally with velocity v and gets caught in the bag. Then for the combined (bag + bullet) system

A bag of mass M hangs by a long massless rope. A bullet of mass in, moving horizontally with velocity u , is caught in the bag. Then for the combined (bag + bullet) system, just after collision

A bag of mass M hangs by a long massless rope. A bullet of mass in, moving horizontally with velocity u , is caught in the bag. Then for the combined (bag + bullet) system, just after collision