Register to reply 
Coriolis force  Question about sign 
Share this thread: 
#1
Dec1712, 12:35 AM

P: 4

Dear all
I have a question concerning the Coriolis acceleration expression. I learnt it as Ac = 2ω x v, where ω is the vector which indicates the rotation axis direction of Earth and v the velocity of a body that I want to check the Coriolis effect on. My question: where the minus sign comes from? As far as I understand, it depends on what reference frame I use (inertial or non inertial  the minus comes from the latter, like the Earth, in my conception). Am I correct? Thanks in advance! 


#2
Dec1712, 03:48 AM

P: 4,246

2ω x v = 2v x ω 


#3
Dec1712, 01:17 PM

Engineering
Sci Advisor
HW Helper
Thanks
P: 7,293

The minus sign is there because humans made the arbitrary decision to use righthanded coordinate systems rather than left handed ones.
The Coriolis force is just a consequece of Newton's laws of motion. The physics doesn't depend on what frame you use to describe it, or whether the frame is inertial or noninertial. The details of the math depend on those things, but "the map is not the country", and similarly "the math is not the phyiscs". 


#4
Dec1712, 02:32 PM

Sci Advisor
HW Helper
Thanks
P: 26,148

Coriolis force  Question about sign
(btw, this is a duplicate thread to http://www.physicsforums.com/showthread.php?t=659387) 


#5
Dec1712, 05:03 PM

P: 4,246




Register to reply 
Related Discussions  
Coriolis Force Question  General Physics  2  
A force acts on a particle based on position, determine work. Sign question.  Introductory Physics Homework  1  
Coriolis force question  Introductory Physics Homework  2  
Tea and the Coriolis force  General Physics  18  
Coriolis force  Earth  1 