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Two bodies of mass 1 kg and 2 kg respectively move in opposite directions with a speed 5 m/s and collide. What is the total momentum before




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Total momentum before collision :
       1 kg * 5 m/s + 2 kg (-5m/s)  = - 5 kg-m/s
                    It is in the direction of motion of 2kg mass

2 5 2
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