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physics

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A 17.0-kg satellite has a circular orbit with a period of 2.31 h and a radius of 9.10×106 m around a planet of unknown mass. If the magnitude of the gravitational acceleration on the surface of the planet is 8.10 m/s2, what is the radius of the planet?
radius = m

  • physics -

    figure the centripetal acceleration v^2/r

    where v=2PIr/T you are given r as 9.10E6

    now set that acceleration equal to

    8.10*(rp/9.1E6)^2 and solve for the radius of the planet rp.

  • physics -

    What is Plr?

  • math -

    Which values are solutions to the inequality below? Check all that apply. sqrtx

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