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The velocities of three particles of mas...

The velocities of three particles of masses 20 g, 30 g and 50 g are `10hat`i, `10hatj` and `10hatk` respectively. The velocity of the centre of mass of the three particles is

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Velocity of centre of mass `v_(cm)=(m_1v_1+m_2v_2+m_3v_3)/(m_1+m_2+m_3)=(20xx10hati+30xx10hatj+50xx10hatk)/100=2hati+3hatj+5hatk`.
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