How can an internal force stop the Earth's rotation? What do you mean?Abdul Quadeer said:Suppose the Earth stops rotating suddenly ( say due to some large internal force ).
That's an odd question. Can you give me a specific example?Abdul Quadeer said:I have seen many questions like 'Suppose the speed of rotation of Earth decreases by some internal force, how would it affect the duration of day' etc
It's certainly true that angular momentum will be conserved if the only forces are internal. But why would you need to use that fact--you're told that the speed decreases.In these questions we use angular momentum concept.
I assume they want you to imagine that mass of the Earth somehow redistributes (due to internal forces) to change the moment of inertia.Abdul Quadeer said:I read that if the moment of inertia of the Earth decreases/increases suddenly, then how will it affect the duration of the day.
How can moment of inertia change suddenly?
Doc Al said:How can an internal force stop the Earth's rotation? What do you mean?
smyth said:i was looking for an answer to this question " what happens to Earth if suddenly stops rotating".
and i don't care about humans, trees, mountains flying away at very high speed, what I'm curios about is how much the orbit of Earth is affected. Let's say I'm a very , very large entity, with fingers, and that I'm putting my finger on Earth, in such way that i forbid him to revolve anymore. In this case, would Earth fly away from the solar system?
If the earth were to suddenly stop rotating, everything on the surface would be violently thrown eastward at high speeds. This would cause immense destruction and chaos as buildings, people, and objects are hurled in different directions. Additionally, the sudden change in motion would cause massive earthquakes and tsunamis.
No, the earth's gravity would not change if it stopped rotating. Gravity is a force that is dependent on mass, not rotation. The earth's mass would remain the same, therefore its gravity would not be affected by the change in rotation.
If the earth stopped rotating, the length of a day would stay the same at 24 hours. However, the sun would appear to stay in the same position in the sky, causing one side of the earth to experience constant daylight and the other side to experience constant darkness.
Yes, the earth's orbit around the sun would be affected if it stopped rotating. The earth's rotation is what creates the centrifugal force that keeps us in orbit around the sun. Without this force, the earth would start to drift away from the sun, eventually breaking out of its orbit.
While it is not likely for the earth to suddenly stop rotating, there are some scenarios that could cause a significant change in the earth's rotation. For example, a large asteroid impact or a collision with another planet could potentially alter the earth's rotation. However, the earth is currently rotating at a stable rate and is not expected to stop anytime soon.