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Three particles of mass 2 g, 1 g, and 3 g respectively, have position vectors:
9.
5 = Sti - 21 )+ (3 - 2),
7, = (21 -1)i + ( +2)j -rk
= (21-3) + (12-5' ) -(4+ 6r - 3r'
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Determine the total linear momentum of the system at t=1 second.

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