1.

Three bodies of mass 1 kg,2 kg & 4 kg have position vectors 3^i, 2^i−^j, 2^i+^j respectively. Then, centre of mass of this system has a position vector :

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Three bodies of mass 1 kg,2 kg & 4 kg have position vectors 3^i, 2^i^j, 2^i+^j respectively. Then, centre of mass of this system has a position vector :



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