The Earth has a mass of 6.0×1024 kg. If we model the Earth as a uniform sphere of radius 6400 km that spins on its axis once per day,
(1) calculate the Earth's angular momentum.
(2) calculate the force required, if applied tangentially, and continuously, at the surface of the Earth to bring the Earth to a stop within 1 year. (1 year is 3.15×107 s.)