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                                    Two bodies of masses of 1 kg and 3 kg initially at rest are moving with velocities 30 m/s and 10 m/s towards each other due to mutual force of attraction. What is the velocity of the centre of mass of system? | 
                            
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Answer»  Two bodies of masses of 1 kg and 3 kg initially at rest are moving with velocities 30 m/s and 10 m/s towards each other due to mutual force of attraction. What is the velocity of the centre of mass of system?  | 
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