Satellite Problems: Find Velocity of Satellite 3600km Above Earth

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Homework Help Overview

The discussion revolves around calculating the velocity of a satellite positioned 3600 km above the Earth, within the context of circular motion principles.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • The original poster attempts to use different equations for velocity, questioning the correctness of their approach. Participants discuss the need to adjust the radius used in the calculations by including the Earth's radius. There is also a query regarding the appropriate force equation to use for the satellite's interaction with the Earth.

Discussion Status

The conversation is ongoing, with some participants providing guidance on the correct use of radius in calculations. Multiple interpretations regarding the force equations are being explored, indicating a productive exchange of ideas without a clear consensus yet.

Contextual Notes

Participants are navigating the complexities of circular motion and gravitational forces, with some assumptions about the necessary parameters for calculations being questioned.

scoles
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We just started the chapter on circular motion. I am trying to find the velocity of a satellite 3600 km above earth. I came up with v= square root of (g)(Mearth/R). Is this correct? I tried V= 2(pie)R/T, but that didn't give me the correct answer.
 
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Yes, that is correct. Keep in mind that you need the radius in that equation, not the height above the Earth. You need to add the radius of the Earth to your altitude.
 
Thank you so much!
 
and also, if I wanted to find the force between the Earth and the satellite, would i use the equation for Force centripetal or Force of Gravity?
 
scoles said:
and also, if I wanted to find the force between the Earth and the satellite, would i use the equation for Force centripetal or Force of Gravity?

Think about it... Didn't you just state before that both equations are equal?
 
o i see... thanks!
 

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