The Naked Scientists

The Naked Scientists Forum

Author Topic: Mainstream F=ma And The Equivalence Principle  (Read 2065 times)

Offline common_sense_seeker

  • Sr. Member
  • ****
  • Posts: 213
    • View Profile
    • Believers In Gravity Shielding (BiGS)
Mainstream F=ma And The Equivalence Principle
« on: 12/05/2009 13:17:23 »
It was my favourite equation from school. It made sense; you could push something heavy and it would take a lot of force and if you pushed something light it would accelerate quickly. It was common sense, f=ma; you knew it made sense. But how can this feeling of certainty be equivalent to the feeling of falling bodies? The thought of a light object falling at the same rate as a lead weight doesn't instantly appeal to the psyche. It's not something that feels intuitively right. It isn't the same feeling of certainty that the moving force brings. The force of my hand can be seen to apply to all the particles of a solid object. If gravity is actually due to particles, then it is not necessarily the same case with falling bodies. We can't see the interactions taking place.

http://en.wikipedia.org/wiki/Equivalence_principle


 

lyner

  • Guest
Mainstream F=ma And The Equivalence Principle
« Reply #1 on: 13/05/2009 00:00:45 »
I should try to read around a bit more and use your intuition a bit less. Intuition is a very suspect reason for deriving Physical Laws.
It's pretty intuitive to think that everything slows down. Newton put us right on that one.
 

Offline Chemistry4me

  • Neilep Level Member
  • ******
  • Posts: 7709
    • View Profile
Mainstream F=ma And The Equivalence Principle
« Reply #2 on: 13/05/2009 07:09:25 »
You might not be feeling it but I certainly am. :)
 

lyner

  • Guest
Mainstream F=ma And The Equivalence Principle
« Reply #3 on: 13/05/2009 17:31:59 »
I'm still rarin' to go.
 

The Naked Scientists Forum

Mainstream F=ma And The Equivalence Principle
« Reply #3 on: 13/05/2009 17:31:59 »

 

SMF 2.0.10 | SMF © 2015, Simple Machines
SMFAds for Free Forums