Inertia in motion - why is momentum called this

AI Thread Summary
Momentum is often referred to as "inertia in motion" because it relates to the mass of an object and its velocity, encapsulated in the formula p=mv. This term, however, is considered ambiguous and not widely accepted in scientific literature, as it does not accurately convey the concept of how difficult it is to change an object's motion. Some participants in the discussion question the validity of this phrase, suggesting it may stem from a misunderstanding of inertia and momentum. Additionally, the conversation touches on the nature of conservative forces, with participants agreeing that all fundamental forces in nature can be classified as conservative. Overall, the term "inertia in motion" lacks clarity and is not commonly used in formal discussions of physics.
Kaxa2000
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Inertia in motion - why is momentum referred to as this?

Also, what forces in nature are conservative does anyone know any examples?
 
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Kaxa2000 said:
Inertia in motion - why is momentum referred to as this?
Referred as what?
Kaxa2000 said:
Also, what forces in nature are conservative does anyone know any examples?
All of them.
 
Why's it referred to as "inertia in motion"
 
Kaxa2000 said:
Why's it referred to as "inertia in motion"

Where did you read that?
The Linear momentum of a particle is defined as p=mv. It is a quantity that remains constant with respect to an inertial reference frame, if no forces act on the particle.
 
It's also called inertia in motion
 
Kaxa2000 said:
It's also called inertia in motion

I have never read or heard this anywhere. The only reason I see for somebody using this, is because mass is sometimes called a measure of inertia.If a mass is in motion it has momentum. I think it is an ambiguous and useless way to describe momentum. You should try to understand the usual definition.
 
I've heard of momentum being referred to, metaphorically, as "inertia in motion". I don't think it's accurate, even as a lie-to-children, because it doesn't represent how hard it is to move the object.
 
ideasrule said:
I've heard of momentum being referred to, metaphorically, as "inertia in motion". I don't think it's accurate, even as a lie-to-children, because it doesn't represent how hard it is to move the object.

This sounds like an old usage. Where did you read it?
 
Inertia in motion alright. Inertia in what else? I have once read that "inertia" literally means laziness. Maybe this has got something to do with it.
Inertia would also be a fantastic name for a female. Wonder why no one has chosen it yet. :D
 
  • #10
Inertia in motion - why is momentum referred to as this?
(a) somebody decided to call it that,
(b) somebody did not like momentum,
(c) somebody is pulling your leg. (fooling you)

Let's call it "floogum" from now on...
 
  • #11
if you look at angular momentum

angular momentum = moment of inertia x angular velocity

where moment of inertia is the distribution of mass
 
  • #12
Kaxa2000 said:
Inertia in motion - why is momentum referred to as this?

It isn't! :smile:

(Unless you can produce a quote …)
 
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