The satellite and its work done

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SUMMARY

The discussion centers on the concept of work done by an artificial satellite in orbit around the Earth. It establishes that if a satellite returns to its original position without performing its assigned tasks, it does not accomplish any physical work, as defined by physics. The conversation highlights that while the satellite may receive and store solar energy, this does not equate to work done unless it is actively performing its functions. Additionally, it clarifies that the gravitational force acting on the satellite does not perform work due to the constant kinetic and potential energy in a circular orbit.

PREREQUISITES
  • Understanding of Newtonian physics, specifically the definition of work and displacement.
  • Familiarity with the concepts of kinetic and potential energy in orbital mechanics.
  • Knowledge of solar energy utilization in satellite technology.
  • Basic principles of gravitational forces and their effects on orbiting bodies.
NEXT STEPS
  • Research the principles of orbital mechanics and the role of gravitational forces in satellite motion.
  • Explore the concept of work in physics, focusing on displacement and energy transfer.
  • Investigate how satellites utilize solar energy for their operational tasks.
  • Examine case studies of satellites that perform specific functions while in orbit.
USEFUL FOR

Students of physics, aerospace engineers, satellite technology developers, and anyone interested in the mechanics of orbital motion and energy utilization in space.

HLAung
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If the starting and ending points are the same, there is no displacement.
If there is no displacement, no matter how much energy is exerted, work is not done.

So, is an artificial satellite orbiting the Earth with the same starting and ending points not working?

In my opinion, in such a problem, we should think about
1. Can the satellite perform its assigned task?
2. If it is functioning, the solar energy it receives, utilizes and stores while orbiting the Earth is its work done.
3. If it is orbiting without functioning, work is not done (Work done is zero.).
 
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An object in a circular orbit has constant kinetic and potential energy, so the Earth's gravitational force does no work on it.

I don't see the relevance of solar energy.
 
Define "work done".

Just because I am lying motionless in bed doesn't mean I haven't done any mental work. I could solve some pesky problem, or write a poem.
 

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