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Two particles mass 100 g and 300 g at a ...

Two particles mass 100 g and 300 g at a given time have velocities `10 hati-7hatj-3hatk and 7hati-9hatj+6hatk ms^(-1)` respectively. Detegnine yelocity of center of mass.

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Velocity of center of mass `=(31i-34j+15k)/(2)ms^(-1)`
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