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Answer to Question #65496 in Mechanics | Relativity for Manoj

Question #65496
The position vector of two particles of mass 4.0 kg and 2.0 kg are, respectively, kjirˆ2ˆˆ321ttt++=r and ()kjirˆ4ˆ1ˆ322tt+-+=r where t is in seconds and the position in metres. Determine the position vector of the centre of mass of the system, the velocity of the cm and the net force acting on the system.
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