Use of forces to escape the Earth

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    Earth Escape Forces
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Discussion Overview

The discussion revolves around the feasibility of using electromagnetic forces to propel objects away from the Earth's surface, potentially achieving orbital velocity. Participants explore theoretical applications, practical challenges, and existing technologies related to this concept.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant suggests that since gravity is a weak force compared to magnetism, it might be possible to use electromagnetism for propulsion to escape Earth's gravity.
  • Another participant notes that while theoretically feasible, using a rail gun for launching objects into orbit from Earth presents practical challenges, including the need to reach speeds over 17,000 MPH and the risk of atmospheric burn-up and sonic booms.
  • A different participant confirms that overcoming gravity is essential and mentions that electromagnetic railguns have been researched, implying that the concept has been explored in some capacity.
  • One participant asserts that current propulsion systems are based on electromagnetic forces, suggesting that the technology is already in use but may require clarification on the specifics of the question posed.

Areas of Agreement / Disagreement

Participants express differing views on the practicality of using electromagnetic propulsion from Earth, with some acknowledging theoretical possibilities while others highlight significant challenges. The discussion remains unresolved regarding the feasibility of such methods in practice.

Contextual Notes

Limitations include the dependence on specific definitions of propulsion systems and unresolved practical challenges related to atmospheric conditions and required velocities for orbit.

rodgergibbs
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If gravity is as we know a weak force and magnetism is a strong force, would it be possible to use electromagnetism to propel an object fast enough away from the Earth's surface to escape the pull of gravity and at least put an object in orbit. I assume you would need a long horizontal then curving into vertical trajectory. Has this ever been looked into?
 
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Welcome to PF rodgergibbs. Theoretically you could use a rail gun to put an object into orbit from some solar system bodies. However, this isn't practical on earth. One big problem is the fact that orbital velocity is over 17,000 MPH which is well above mach one for a projectile being launched from the surface. Anything fired at that speed from the surface would likely burn up in the atmosphere. And, even if it didn't, it would create seriously loud sonic booms whenever it was launched.
 
Hello rodgergibbs, :welcome:
You still have to overcome gravity ...
And you bet it's been looked into ! Google electromagnetic railgun
 
rodgergibbs said:
would it be possible to use electromagnetism to propel an object fast enough away from the Earth's surface to escape the pull of gravity and at least put an object in orbit

We actually do that. All currently used propulsion systems are based on electromagnetic forces. Maybe you need to specify your question.
 
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