MCQOPTIONS
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				| 1. | 
                                    If no external force acts on a system of bodies, the total linear momentum of the system of bodies remains constant. Which law states this? | 
                            
| A. | Newton first law | 
| B. | Newton second law | 
| C. | Newton third law | 
| D. | Principle of conservation of linear momentum | 
| Answer» E. | |