Find Earth angular momentum

Home Problems and Answers Classical Mechanics Find Earth angular momentum


Find Earth angular momentum using Earth-Sun distance and mass of Earth?
Earth - Sun distance 149.6x109 m
Mass of the Earth 5.9742x1024 kg

Earth angular momentum
Earth Sun system

For an orbit, angular momentum is conserved, and this leads to one of Kepler's laws. For a circular orbit, angular momentum is
angular momentum

The average angular momentum is mvr, treating the Earth as if it were a point mass.

Mean distance from Earth to Sun is 149.6×106 km (8.31 minutes at the speed of light)
Mass of the Earth is 5.9742×1024 kg

Earth takes 365 days to go one complete circle around Sun.
velocity
velocity
velocity
velocity

Average angular momentum
angular momentum
angular momentum
angular momentum

Earth angular momentum is 2.663x1040 kgm2s-1

There is no special name for this combination of units. The direction of the vector is perpendicular to the orbit.