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28 Oct 2010 09:08:09 IST

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a 45 kg skater moving at 10 m/s is picked up by her 7 5kg partner who is skating in the same directi

Physics , Mechanics , Kinematics , NewtonsLawsCirMotion , Work Power Energy collisions , Rotation , Gravitation , Simple Harmonic Motion , Fluid Mechanics , Materials Wave Sound , Super Position , units dimensions , com momentum , shm , wave sound

a 45 kg skater moving at 10 m/s is picked up by her 7 5kg partner who is skating in the same direction at 18m/s. They move of together. What is th evelocity of the centre of mass before he picks her up and after

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