Equation for Mass Moving Near Speed of Light: What Is It?

  • Context: Undergrad 
  • Thread starter Thread starter DeepSpace9
  • Start date Start date
Click For Summary

Discussion Overview

The discussion revolves around the behavior of mass as it approaches the speed of light, particularly in the context of hypothetical scenarios involving a "speed of light engine" and the limitations on the velocities that massive objects can achieve. The scope includes theoretical considerations from special relativity and the implications of mass and energy in relativistic contexts.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant questions the concept of a "speed of light engine" and asserts that objects with mass cannot reach the speed of light, emphasizing that they can be accelerated to any speed below c, but require increasingly more energy as they approach it.
  • Another participant notes that while mass does not change in its own frame of reference, it asymptotically approaches the speed of light without ever reaching it, regardless of the energy applied.
  • There are established equations in special relativity that describe the behavior of mass and energy as velocities increase, with references provided to relevant Wikipedia articles for further reading.

Areas of Agreement / Disagreement

Participants generally agree that mass cannot reach the speed of light and that there are established equations governing this behavior. However, there is some contention regarding the hypothetical nature of a "speed of light engine" and its implications.

Contextual Notes

The discussion does not resolve the implications of hypothetical scenarios involving mass and speed, nor does it clarify the specific equations referenced. There is also an absence of detailed mathematical derivations or definitions that could further inform the discussion.

DeepSpace9
Messages
57
Reaction score
1
That calculates how mass a behaves as it nears the speed of light?

Let me rephrase, if we put a speed of light engine inside a school bus. At what speed would the bus top out at? Is there a certain speed that a weight can go? Or can't go faster than?

If so what is an equation that can explain this.
 
Physics news on Phys.org
..how mass a behaves as it nears the speed of light?

as an added note, the mass experience no change in behavior in its own frame; in other words, it rest mass remains fixed. In addition, the proper time of the mass ticks off at it's same fixed, steady, unchanging rate...

The bus will approach the speed of light asymptotically, never quite reaching reaching c, no matter how much energy is expended.
 

Similar threads

  • · Replies 5 ·
Replies
5
Views
716
  • · Replies 18 ·
Replies
18
Views
2K
  • · Replies 26 ·
Replies
26
Views
1K
  • · Replies 6 ·
Replies
6
Views
2K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 12 ·
Replies
12
Views
2K
  • · Replies 45 ·
2
Replies
45
Views
5K
  • · Replies 64 ·
3
Replies
64
Views
6K
  • · Replies 130 ·
5
Replies
130
Views
17K
  • · Replies 6 ·
Replies
6
Views
2K