Gravitational Potential energy question

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SUMMARY

The discussion centers on calculating the gravitational potential energy, kinetic energy, binding energy, and escape energy percentage for a satellite with a mass of 5.00 x 102 kg in a circular orbit 200 km above Earth's surface. The gravitational potential energy was correctly calculated as -3.13 x 1010 J. The user struggled with determining the radius for kinetic energy calculations, mistakenly referencing the Schwarzschild Radius, which is irrelevant for this problem. The Earth’s radius of 6000 km is crucial for accurate calculations.

PREREQUISITES
  • Understanding of gravitational potential energy equations, specifically Eg = - GMem/re
  • Knowledge of kinetic energy calculations using the formula Ek = 1/2mv2
  • Familiarity with the concept of circular orbits and orbital mechanics
  • Basic understanding of the gravitational constant (G) and its application in physics
NEXT STEPS
  • Calculate the kinetic energy of the satellite using the correct radius derived from Earth's radius and orbital height
  • Research the concept of binding energy in orbital mechanics
  • Explore the calculations for escape velocity and the percentage increase in launching energy
  • Study the differences between Schwarzschild Radius and relevant gravitational equations for circular orbits
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Students studying physics, particularly those focused on mechanics and gravitational forces, as well as educators looking for examples of orbital energy calculations.

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Homework Statement


a 5.00 x 10^2 kg satelilite is in circular orbit 2.00 x 10^2 km above Earth's surface. calculate

a) gravitaional potential energy which i got, which is -3.13 x 10^10 J
b) kinetic energy of the satellite
c) binding energy of satellite
d) the percentage increase in launching energy required for the satellite to escape earth

Homework Equations



2GM/c^2

Eg = - GMem/re

The Attempt at a Solution



v = sqroot GM/r for the velocity then using the equation 1/2mv^2 to get the Ek, but i don't know how to get the radius so i can plug it into the Ek equation.
 
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The Earth has a radius of 6000 km.
 
How did you get the gravitational potential without knowing the radius?
2GM/c^2
That's Schwarzschild Radius. That is not a relevant equation for this problem.
 

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