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A boy on a 2.2kg skateboard initially at rest tosses a 7.9kg jug of water in the forward direction.
If the jug has a speed of 3.2m/s relative to the ground and the boy and skateboard move in the opposite direction at .56m/s, find the boy's mass.
Answer in units of kg.

  • Physics -

    initial momentum= final momentum

    solve for M

  • Physics -

    24.048 kg

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