The velocity of a satellite rotating around the Earth

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Homework Help Overview

The discussion revolves around determining the velocity of a satellite in orbit around the Earth, specifically focusing on the correct interpretation of the distance variable 'r' in relation to the satellite's altitude and the Earth's radius.

Discussion Character

  • Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • Participants are exploring the definition of 'r' in the context of the problem, with some suggesting it may simply be the altitude, while others express confusion about the relationship between altitude and the distance from the Earth's center.

Discussion Status

There is an ongoing exploration of the definitions and values involved in the problem. Some participants have raised concerns about the accuracy of the given gravitational acceleration and its implications for the satellite's distance from the Earth's center. Guidance has been offered regarding the need for clarity in the question's wording.

Contextual Notes

Participants are working with specific values for gravitational acceleration and distances, which may not align with standard assumptions. The discussion highlights potential discrepancies in the problem setup that could affect the interpretation of the satellite's altitude and distance.

yashboi123
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Homework Statement
A satellite travels at an altitude of 6580 km where gravity is 9.2 m/s^2.
Relevant Equations
v^2/r = a
1694914128479.png

Not sure what r would be in this scenario. I tried adding the radius of the earth to the altitude but that wasn't correct either.
 
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It looks like r is just the 'altitude'.
 
yashboi123 said:
Not sure what r would be in this scenario. I tried adding the radius of the earth to the altitude but that wasn't correct either.
Please show your work. We cannot help you if you don't tell us what you did.
 
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The confusion is in the question itself.

If gravity is 9.2 m/s^2 (as stated in the question), then satellite distance from earth center is 6580km (verify yourself!). And that distance should not be called altitude :-(

If altitude is really 6580km, g is about 2.38 m/s^2.
 
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