A bag of mass M hangs by a long thread and a bullet of mass m moving horizontally with speed v gets caught in the bag. For the combined system (bag + bullet), which statements are correct?
Select all that apply

Question

A bag of mass M hangs by a long thread and a bullet of mass m moving horizontally with speed v gets caught in the bag. For the combined system (bag + bullet), which statements are correct?

G1 Physics · Accepted Answer

Use p = mv and conservation of total linear momentum for an isolated system. Resolving components with the given data gives C: Momentum is mv; D: Kinetic energy is m²v²/[2(M+m)].