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a boat of mass 90 kg is floating in still water a body of mass 30 kg walks from the stern to the boat the length of the boat is 3m. calculate the distance through which the boat move.

  • physics -

    He doesn't move actually 3 meters, as the boat is moving a distance d beneath him. So his mass actually moves (3-d).
    The center of mass should remain at zero.

    solve for d. Negative means in the direction opposite to his movement.

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