Assume that the orbit of the earth around the sun is circular.The distance from the earth to the sun is 1.5x10^11 m. The massesof the earth and the sun are Me= 5.98x10^24kg and Ms=1.99x10^30kg.
a) Find the orbital speed of the earth
b) The period of the earth and then express it in years.
c) Find the gravitational force between the earth and the sun.