Homework Help: physics

Posted by Maa on Saturday, December 4, 2010 at 8:48am.

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 - Damon, Saturday, December 4, 2010 at 11:14am
(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 - angel, Saturday, December 4, 2010 at 7:46pm
my school subject is music

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