Out of aphelion and perihelion, where is the speed of the earth more and why?
Aphelion is the positon of earth from where it has the greatest distance from the sun and perihelion is the position from where it has the shortest distance. Now since the angular momentum of earth about the sun is conserved then we have:
Where m is the mass of the earth, rap is the earth - sun distance at the aphelion and rpe is the earth - sun distance at the perihelion.
Since rap > rpe, vpe > vap, therefore the velocity at the perihelion is greater than the velocity at the aphelion.
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