Calculate the ratio between the kinetic energy of rotation of a planet (mass=4.30E+24 kg, radius=7.60E+6 m) to the kinetic energy of its center of mass orbiting around its sun at a distance of 1.20E+12 m. Like the Earth, it has a day lasting 24 hours and a year lasting 365.25 days.
KErot= (1/2)Iw^2 and I believe KE=(1/2)mv^2
The Attempt at a Solution
For the KErot:
and I got 2.62698301E29 J
for the other one:
and got 1.22730571E35 J
I devided KE by KErot and got 467192 for the ratio. but it's wrong and I know I'm doing something wrong but can't figure it out. any help will be great!