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physics

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suppose the moon were held in its orbit not by gravitational interaction with the Earth but by a long, mass-less cable attached to the center of the earth. What would be the tension in the cable?

  • physics -

    What is centripetal force? massmoon*v^2/r

    But I wonder what would hold Earth?

    In fact the moon is not orbiting around Earth,but around a common center of gravity. That probably is too compliated for this thinking, after all, a massless cable almost 200,000 miles is a stretch. Pun intended.

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