Why Does Increasing a Satellite's Altitude Affect Its Total Energy?

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SUMMARY

Increasing a satellite's altitude affects its total energy due to the interplay between kinetic energy (K.E) and potential energy (P.E). The total energy (T.E) of the system, defined as T.E = K.E + P.E, remains constant when the work done by non-conservative forces is zero. As altitude increases, potential energy becomes less negative, indicating an increase, while kinetic energy decreases. This discussion emphasizes the importance of understanding energy conservation in orbital mechanics.

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  • Understanding of gravitational potential energy and its formula
  • Familiarity with kinetic energy concepts
  • Knowledge of orbital mechanics and satellite dynamics
  • Basic principles of energy conservation in physics
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  • Study the principles of gravitational potential energy in detail
  • Explore the relationship between kinetic energy and orbital velocity
  • Research the effects of non-conservative forces on satellite orbits
  • Learn about energy conservation laws in closed systems
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Students studying physics, aerospace engineers, and anyone interested in satellite dynamics and energy conservation principles.

nishanth R
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Homework Statement


If height of a satellite from the surface of Earth is increased, why does the total energy increase?

Homework Equations



T.E=K.E + P.E

The Attempt at a Solution


Here the work done by non-conservative forces is zero. This means that the total mechanical energy of the system will remain constant. So if we increase the height,, potential energy will become less negative that is it will increase. K.E will decrease. However total energy would be constant
 
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nishanth R said:
Here the work done by non-conservative forces is zero. This means that the total mechanical energy of the system will remain constant.
I don't follow the logic. Why are you assuming that there is no work done by non-conservative forces?

If the work done by non-conservative forces is zero, how did the satellite change orbits? Do orbiting objects spontaneously change their orbits with no external energy input? Why is the Moon still here?
 

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