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28 March, 21:40

A 2.0-kg ball rolls to the right at 3.0 m/s. A 4.0-kg ball rolls to the left at 2.0 m/s. What is the momentum of the system after a head-on collision of the two balls?

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  1. 28 March, 23:25
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    Final momentum after a head on collision is - 2kgm/s

    Explanation:

    One ball moves to the right and the other moves opposite and momentum is a vector quantity so that considering the direction

    Initial momenta are P₁=2x3=6kgm/s P₂=4x (-2) = -8kgm/s

    Final momentum is the vector sum of P (final) = 6-8 = - 2 kgm/s
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