
| (P) | The momentum of the system is conserved. | 
| (Q) | The kinetic energy of the system does not change after the collision. | 
| (R) | The angular momentum of the system is conserved. | 
| 1. | P, Q, and R are true. | 
| 2. | P and R are true. | 
| 3. | Only R is true. | 
| 4. | Only P is true. | 
