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Old 08-14-2015, 03:49 PM   #41
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Old 08-14-2015, 03:50 PM   #42
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Old 08-14-2015, 03:54 PM   #43
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Quote:
Originally Posted by Repth View Post
That is a very unfavorable definition. I prefer another definition:

"An apparent force, proportional to a body's mass, that appears to affect the body within a noninertial frame but is absent from the point of view of an inertial frame. Centrifugal forces and Coriolis forces are inertial forces."

To call it a fake force is so misleading, as if there is not actually a reason for the dice moving backwards. The idea of a "fake force" only exists because we introduced the convention of a non-inertial reference frame, which sometimes makes things easier to calculate mathematically but rarely ever makes them easier to understand. When you call it a fake force you are not making the connection to why we include that term at all. I think that is very misleading.
So you agree that inertial forces are in fact fake and only used to help understand why it seems like the dice moves backwards? Because "apparent" means seeming real or true, but not necessarily so.

Are you just argueing his choice of words or the validity of his statements?
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Old 08-14-2015, 03:55 PM   #44
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I googled inertia force and came up with this Wikipedia article.

https://en.m.wikipedia.org/wiki/Fictitious_force
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Old 08-14-2015, 03:56 PM   #45
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Quote:
Originally Posted by ArkansasDave View Post
http://dictionary.reference.com/browse/inertia+force

Inertia force 1.
an imaginary force supposed to act upon an accelerated body, equal in magnitude and opposite in direction to the resultant of the real forces
BOOM!
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Old 08-14-2015, 03:58 PM   #46
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I remember it from centrifugal force... Below is that definition.


In Newtonian mechanics, the term centrifugal force is used to refer to an inertial force (also called a 'fictitious' force) that appears to act on all objects when viewed in a rotating reference frame, drawing them away from the axis.
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Old 08-14-2015, 04:00 PM   #47
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Old 08-14-2015, 04:01 PM   #48
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Quote:
Originally Posted by Shelnutt View Post
I'm sorry I thought we were talking about inertia forces not inertia.
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Old 08-14-2015, 04:01 PM   #49
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Old 08-14-2015, 04:03 PM   #50
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Old 08-14-2015, 04:04 PM   #51
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Quote:
Originally Posted by Shelnutt View Post
Riddle me this...

If inertia is fake, why is the REAL force acting on it. The dice aren't moving by themselves.
Inertia isn't fake, inertial forces are. The dice are only moving forward and they are being accelerated by the tension force in the string that is holding hem up.
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Old 08-14-2015, 04:07 PM   #52
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Old 08-14-2015, 04:13 PM   #53
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Quote:
Originally Posted by Repth View Post
Yes, I too can google definitions. Here's the thing, there's not always just one definition for a term. I already posted one that I think more appropriately explains what an inertial force is. Like I said, I'm not arguing that some people refer to inertial forces this way, I'm simply arguing that it's silly, unnecessary, and unintuitive.



Someone's still upset about getting schooled on the last physics discussion...
Your definition is pretty much the exact same as that one.
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Old 08-14-2015, 04:16 PM   #54
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Old 08-14-2015, 04:20 PM   #55
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And saying non inertial reference frame is gonna help? I think you over estimate the average layman.
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Old 08-14-2015, 04:24 PM   #56
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Old 08-14-2015, 04:33 PM   #57
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Quote:
Originally Posted by Repth View Post
Yes, I too can google definitions. Here's the thing, there's not always just one definition for a term. I already posted one that I think more appropriately explains what an inertial force is. Like I said, I'm not arguing that some people refer to inertial forces this way, I'm simply arguing that it's silly, unnecessary, and unintuitive.



Someone's still upset about getting schooled on the last physics discussion...
I don't think so. You never proved your point. And we gave you ample opportunity.
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Old 08-14-2015, 04:34 PM   #58
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I am assuming you have a degree in Physics? Maybe mechanical engineering?
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Old 08-14-2015, 04:37 PM   #59
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Old 08-14-2015, 04:40 PM   #60
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