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physics

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Find the rotational kinetic energy of the earth about the sun due to its orbit about the sun. The mass of the earth M is 6 x 1024 kg, the orbital radius r is 1.5 x 1011 m and the rotational period T is 1 year. Treat the earth as a point mass in this problem

  • physics -

    (1/2) I w^2

    I = m r^2
    = 6*10^24 * 1.5*10^11 * 1.5*10^11

    w = 2 pi/T
    = 2 pi/(1 yr * 365 d/yr *24hr/d*3600s/hr)

  • music -

    my school subject is music

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