1N Force and going near the speed of light?

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Discussion Overview

The discussion revolves around the implications of applying a constant force (1N) to an object with a mass of 1 kg, particularly in the context of relativistic speeds approaching the speed of light. Participants explore concepts of acceleration, inertial reference frames, and the energy requirements for reaching such speeds, while also addressing misunderstandings related to relativistic mass.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Mathematical reasoning

Main Points Raised

  • One participant proposes that applying a 1N force to a 1 kg mass could theoretically allow it to reach speeds of 0.9999999c given enough time.
  • Another participant questions how a constant force can be applied if the object accelerates away from the observer.
  • Concerns are raised about the definition of inertial reference frames, with one participant arguing that an accelerating object cannot be an inertial frame.
  • Some participants clarify that once the force is removed, the object will not continue to accelerate and will instead move at a constant velocity.
  • There is a discussion about the energy required to accelerate a mass to relativistic speeds, with estimates suggesting that significant energy is needed, comparable to global energy consumption.
  • Participants debate the concept of relativistic mass, with some asserting that mass increases significantly at high speeds, while others reference articles arguing against the utility of the concept of relativistic mass.
  • One participant expresses confusion regarding the implications of relativistic mass and seeks clarification on the equations involved.

Areas of Agreement / Disagreement

Participants express differing views on the application of force, the nature of inertial frames, and the implications of relativistic mass. The discussion remains unresolved, with multiple competing perspectives on these topics.

Contextual Notes

Limitations include varying interpretations of relativistic mass and the assumptions underlying the application of Newtonian mechanics in relativistic contexts. The discussion also highlights the complexity of energy requirements for accelerating objects to relativistic speeds.

  • #31
oz93666 said:
we seem agreed that at 0.9999c the 1kg mass now has a mass of 70kg
No it has a mass of 1kg, as stated multiple times already.
Please open a separate thread if you want to discuss this further.
Arman777 said:
Can someone close this thread pls.It going out of topic
Okay.
 

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