1. The radius of the Earth is 6.4- 10 m, Mass of the Earth is 6- 1024 kg, and distance of the Earth from the sun is 1.5 - 10 m. (a) Calculate the angular velocity of the Earth's rotation. Wrot V rad/s (b) Calculate the moment of inertia assuming that Earth is a sphere. sphere Vkg m2 (c) Calculate the rotational kinetic energy of Earth on its axis. KE rot VJ (d) Calculate the angular velocity of the of Earth in its orbit around the Sun. Wrev V rad/s