Earth's rotational speed when its gravity is 5.0m/s2

AI Thread Summary
The discussion centers on calculating Earth's rotational speed if gravity were hypothetically reduced to 5.0 m/s². Participants clarify that the question likely involves determining how much the Earth's spin would need to increase to halve effective gravity at the equator. There is a focus on using the equation for centripetal acceleration and the Earth's radius for calculations. The conversation emphasizes the need for precise phrasing in such hypothetical scenarios. Overall, the thread aims to explore the relationship between rotational speed and gravitational force.
amosor
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What will be the rotational speed of the Earth when gravity would be
only 5.0m/s2
 
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Why would it be different? Since this is a contrived hypothetical, you'll need to explain...Are you assuming its rotational momentum is the same and its inertia is different?
 
Odd question. Use of an arbitrary number implies homework. Maybe the OP misparaphrased something like "how much would the Earth's spin need increase, in order to halve effective gravity at the equator"?
 
cesiumfrog said:
Odd question. Use of an arbitrary number implies homework. Maybe the OP misparaphrased something like "how much would the Earth's spin need increase, in order to halve effective gravity at the equator"?

Yes, you express my question more precisely. Will you be kind to help me to calculate this speed and show me the way you do it?
Thanks.
 
Yes, you express my question more precisely. Will you be kind to help me to calculate this speed and show me the way you do it?
Thanks
 
Well, do you know the equation for centripetal acceleration and the radius of the earth...?
 

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