Velocity vs. Acceleration

Walter & Group :

 

 

Server...

 

Yes.  In the past I, too, have been guilty of mixing up the terms, "velocity" and "acceleration".  In my latest comments, however, I've tried not to do that and have looked at, "acceleration" as, "increase in velocity".

 

Thanks for pointing this out.

 

Gordy

 

 

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Walter,

 

Good point - I felt uncomfortable making the statement but wasn't sure why.  You have good intuition because there is some form of subtle stationary character even with the velocity direction and this has to be related to the dynamic rod straightening process.  If the rod where rigid rather than undergoing straightening it is clear that there would be a centripetal acceleration component in the acceleration while the speed is stationary (so therefore zero acceleration in the tangential direction).  I am still a little unsettled in how to treat this -- perhaps the correct thing to do is to formulate the motion in tangential/normal coordinates rather than polar coordinates.  That may clarify the situation for me (perhaps the instantaneous radius of curvature is infinite which renders the normal component also equal to zero and makes the total acceleration exactly zero - I think so.).  Feel free to chime-in on the other comments I made because I am now trying to tie a few flies and leave for a 3 day fishing trip.  Hopefully I can leave the house my house by 1 AM tomorrow morning and make the drive to the Missouri River.  I'll answer Gordy's questions after I return but as I say feel free to remark before I return.  By the way I have encountered on other occasions casters mixing-up velocity and acceleration   [always the same mix-up -- thinking that velocity is acceleration].  But I will elaborate after returning.

 

Again - good point and shows me strong intuition.  Have you got your "kick-back" under control??

 

Server