what makes the earth spin and keep spinning?
In: 28
Conservation of angular momentum. Its an observation and law of nature that things continue moving unless acted on by external forces.
When the gas cloud the formed the sun and earth collapsed, it had some net angular momentum, and that caused the initial spin. Once it is spinning, we need some external force to stop it. There are some force like tidal forces from the moon and sun, but those a small and insufficient to stop the Earth’s spin, though it has slowed down a bit.
In other words “Why do you expect the earth stop spinning?”
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