Physics help please

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A 40-kg child is standing still on a 10-kg skateboard, which is also at rest. If the child walks to the right at 2 m/s, what is the resulting velocity of the skateboard?

  • Physics help please -

    momentum net is zero.
    0=40*2 + 10*v

    solve for v.

  • Physics help please -

    Don't know

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