All Questions
Tagged with inertia special-relativity
30
questions
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How do you calculate kinetic energy in a convention where the one-way speed of light is anisotropic?
The question about measuring the one-way speed of light has been debated in several posts in this forum, and are treated in detail on this wiki page.
In relation to this debate, I wonder how you would ...
3
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6
answers
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Mass definition
One definition of mass is 'a measure of the quantity of matter in an object at rest relative to the observer'. What do 'at rest' and 'relative to the observer' mean here? I know it has to do with mass ...
2
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4
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290
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Thought experiment in Mach's principle - Can a void universe be considered with special relativity?
Mach's principle is based on a thought experiment in which an astronaut floats in the middle of a space devoid of all matter and all landmarks. No star, no source of energy is present, whatever the ...
user87745
-4
votes
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If you could zero out your momentum, could you travel faster than the speed of light [closed]
I figure I'm going to get ridiculed for this question, and maybe deservedly so. The sensor images and eyewitness accounts from the Naval Aviators released last year of unexplained aerial phenomena ...
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5
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If inertia is affected by velocity, and velocity is relative, doesn't that mean that inertia is frame-dependent? [duplicate]
Here, by inertia, I mean the tendency of an object to retain its state of motion and resist change. Another way of defining inertia is how much force is needed to create a certain amount of ...
user283752
1
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2
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168
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Is inertia and gravity determined by relativistic mass or invariant mass?
As far as I know, mass fundamentally determines inertia and the gravitational force. But since there are two types of mass, which mass determines which? From what I have read so far, and correct me if ...
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4
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849
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Is light affected by inertia?
A very popular way used by teachers to explain Einstein's theory that The speed of light is a Universal Constant, is to use an example as follows:
Two observers moving relative to each other [let's ...
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What are the "masses"?
I know there are three "masses".
"inertial mass", based on Newtonian Mechanics
"rest mass" and "relativistic mass", based on relativity
Anyone can explain three ...
1
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0
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Inertial mass and gravitational mass [closed]
I would like to ask about gravitational mass. I know inertial mass is changing by motion (speed) according to $m=\frac{m_o}{(1-v^2/c^2)^{1/2}}$ And also that is inertial mass which sits in $E=mc^2$. ...
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14
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6
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How can energy have inertia?
How can energy have inertia?
To my intuition, inertia is so closely associated with mass that my intuition says "Huh?"
Indirectly by mass energy equivalence it works fine, for example:
I have a ...
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3
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201
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Mass as worldline tension?
In Special Relativity, the equation of motion of a particle of proper mass $m$ is
\begin{equation}\tag{1}
\frac{d p^a}{d \tau} = \mathfrak{F}^a,
\end{equation}
where $p^a = m \, u^a$ is the 4-momentum,...
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2
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How does inertia work at the particle level?
I've read recently that the mass of a proton is mostly not given by the Higgs mechanism. But rather it's given by the energy of quarks moving around inside the proton and gluons and other internal ...
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The relation between mass, inertia and energy
I have trouble understanding the following concept:
I learnt that mass is a measure of inertia, and that seemed logical enough. Yet separately I learnt that mass is a form of condensed energy. If ...
- 559
-1
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811
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Inertial force in a bus [duplicate]
While i am standing in a bus that is accelerating an inertial force is acting on me in the direction opposite of acceleration (I understand that). But, what is the magnitude of that force.I thought it ...
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Is the inertia of light equal to the inertia of mass under $E=mc^2$?
Under $E=mc^2$, 1kg of matter has $9\times 10^{10}$ joules of energy. So, if I had just the light shining from $9\times 10^8 $ 100 Watt light bulbs inside a perfectly reflective box, would that light ...
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