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Physics

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A chain is held on a frictionless table with 1/3 of its length hanging over the edge. If the chain has length L = 33 cm and mass m = 21 g, how much work is required to pull the hanging part back onto the table?

  • Physics -

    11 cm = 0.11 m hung over the edge, and the center of mass of that part of the chain was 0.055 m below the edge.

    The work required to lift it all onto the table would be

    W = m g H =
    0.021 kg*g*(0.055 m) = ___ joules

  • Physics -

    0.11 m, so the center of mass of that part of the chain is 0.055 m below edge.

    W = mgH = (0.021/3)kg*g*(0.055) = ____J

    notice that the kg is different.

  • Physics -

    asdasd123123

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