[Physics] Fwd: Physics Digest, Vol 5, Issue 2

[carmam at tiscali.co.uk]

Olivier, I have just received your email dated 8/2/17 !!! I recall when posting the article referred to that I used the example of the sliding door on my van, which stayed exactly where it was with reference to the road when I drove my van away. This is normally attributed to inertia. There is no such thing as inertia,  the sliding door is quite simply obeying Newton's first law.In your equation, there is no need for the (i) and the (g), as M refers to the same mass.
Regards,Tom Hollings



----Original Message----

From: olivier.serret at free.fr

Date: 08/02/2017 11:32

To: <physics at tuks.nl>

Subj: Re: [Physics] Fwd: Physics Digest, Vol 5, Issue 2







Hello Tom,
 
Difficult to understand what you mean by “Inertia 
is an illusion, there isno such thing, therefore there is no "inertial mass", 
just mass”. It looks like a confusion between ‘inertial mass’ and ‘inertial 
force’.
 
I guess we agree there is no “active” inertial 
force. Inertial force is the result, the sum, of the other forces, it is the 
effect. 
For example, on the equation 
F(inertia) = F(gravitation)
M(i) * a = M(g)  *  g
F(gravitation) is the cause
F(inertia) is the effect
 
If you disagree with the points herebefore, could 
you tell me where exactly you disagree ?
 
Thank you, and best regards
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