Calculating Orbital Speed and Period for a Satellite in Circular Orbit

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SUMMARY

The discussion focuses on calculating the orbital speed, period, and gravitational force acting on a satellite with a mass of 600 kg in a circular orbit at a height equal to the Earth's mean radius. The relevant equations include v² = GM/r for orbital speed, T = (2π)r/v for the period of revolution, and F = GmM/r² for gravitational force. It is established that the satellite's orbital speed is independent of its mass, relying solely on the mass of the Earth and the radius of orbit.

PREREQUISITES
  • Understanding of Newton's law of universal gravitation
  • Familiarity with circular motion concepts
  • Knowledge of gravitational constant (G)
  • Basic algebra for manipulating equations
NEXT STEPS
  • Research the gravitational constant (G) and its significance in orbital mechanics
  • Learn about centripetal force and its application in satellite motion
  • Explore the derivation of Kepler's laws of planetary motion
  • Study the effects of altitude on satellite speed and period
USEFUL FOR

Students in physics or engineering, educators teaching orbital mechanics, and anyone interested in satellite dynamics and gravitational forces.

mizzy
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Homework Statement


A satellite of mass 600kg is in a circular orbit about the Earth at a height above the Earth equal to the Earth's mean radius. Find:
a) the satellite's orbital speed
b) the period of its revolution
c) graviational force acting on it


Homework Equations


a) v^2 = GM/r

b) T = (2pie) r/ v

c) F = GmM/r^2


The Attempt at a Solution


for part a, is the satellites orbital speed dependent on the mass of the earth? Do I use mass of earth? or the satellite?
 
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mizzy said:

The Attempt at a Solution


for part a, is the satellites orbital speed dependent on the mass of the earth? Do I use mass of earth? or the satellite?

Part a) you are equating the centripetal force on the satellite, so the mass of the satellite cancels out. The rest look correct.
 
ok. thanks.
 

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