|
|
|
|
#1
10-27-2005, 04:07 AM
|
|||
|
|||
Re: Speed Limits
[ QUOTE ]
[ QUOTE ] [ QUOTE ] [ QUOTE ] [ QUOTE ] A lot of it is a wind resistance thing. -James [/ QUOTE ] .5mV^2, right? [/ QUOTE ] Where the [censored] did you pull this from? This is part of a location/velocity/acceleration equation. [/ QUOTE ] Its units are energy. [/ QUOTE ] Oh [censored]. I read it a little fast. It is kinetic energy. It's still way off, though. [/ QUOTE ] Forgive me if I don't remember the formula correctly. Oh [censored], I did get it wrong. lol. The force due to drag is what I meant to put there. Replace m with A. 
|
|
#3
10-27-2005, 04:18 AM
|
|||
|
|||
|
Re: Speed Limits
[ QUOTE ]
[ QUOTE ] The force due to drag is what I meant to put there. Replace m with A. [/ QUOTE ] (1/2) AV^2? [/ QUOTE ] Pretty sure you're going to need a drag coefficient and the density of the fluid in the there somewhere as well.
|
|
#4
10-27-2005, 04:20 AM
|
|||
|
|||
|
Re: Speed Limits
[ QUOTE ]
[ QUOTE ] [ QUOTE ] The force due to drag is what I meant to put there. Replace m with A. [/ QUOTE ] (1/2) AV^2? [/ QUOTE ] Pretty sure you're going to need a drag coefficient and the density of the fluid in the there somewhere as well. [/ QUOTE ] Yes; that's what I was prompting him for as as it stands the units aren't even right.
|
|
#5
10-27-2005, 04:31 AM
|
|||
|
|||
|
Re: Speed Limits
[ QUOTE ]
[ QUOTE ] [ QUOTE ] [ QUOTE ] The force due to drag is what I meant to put there. Replace m with A. [/ QUOTE ] (1/2) AV^2? [/ QUOTE ] Pretty sure you're going to need a drag coefficient and the density of the fluid in the there somewhere as well. [/ QUOTE ] Yes; that's what I was prompting him for as as it stands the units aren't even right. [/ QUOTE ] ~ Cd*rho*A*v^2
|
|
#6
10-27-2005, 04:45 AM
|
|||
|
|||
|
Re: Speed Limits
I tend to do 90 on my bi weekly motorway trips and there are still a lot of people who pass me, the 70mph limit on the motorways most people ignore and the police supposedly will only stop you if you are going over 85. I get 35mpg out of my car doing these speeds the published figures are 37.7mpg so the loss isnt that significant.
|
|
#7
10-27-2005, 04:53 AM
|
|||
|
|||
|
Re: Speed Limits
[ QUOTE ]
[ QUOTE ] [ QUOTE ] The force due to drag is what I meant to put there. Replace m with A. [/ QUOTE ] (1/2) AV^2? [/ QUOTE ] Pretty sure you're going to need a drag coefficient and the density of the fluid in the there somewhere as well. [/ QUOTE ] Is it ok if I just leave it out so that we can see that the force is proportional to the square of the speed? k, thanx
|
|
#8
10-27-2005, 04:54 AM
|
|||
|
|||
|
Re: Speed Limits
[ QUOTE ]
[ QUOTE ] [ QUOTE ] [ QUOTE ] The force due to drag is what I meant to put there. Replace m with A. [/ QUOTE ] (1/2) AV^2? [/ QUOTE ] Pretty sure you're going to need a drag coefficient and the density of the fluid in the there somewhere as well. [/ QUOTE ] Is it ok if I just leave it out so that we can see that the force is proportional to the square of the speed? k, thanx [/ QUOTE ] But there should also be a term to account for the "shape" of the object.
|
|
#9
10-27-2005, 05:15 AM
|
|||
|
|||
|
Re: Speed Limits
[ QUOTE ]
[ QUOTE ] [ QUOTE ] [ QUOTE ] [ QUOTE ] The force due to drag is what I meant to put there. Replace m with A. [/ QUOTE ] (1/2) AV^2? [/ QUOTE ] Pretty sure you're going to need a drag coefficient and the density of the fluid in the there somewhere as well. [/ QUOTE ] Is it ok if I just leave it out so that we can see that the force is proportional to the square of the speed? k, thanx [/ QUOTE ] But there should also be a term to account for the "shape" of the object. [/ QUOTE ] A*Cd? Fd= .5 pv^2 A*Cd
|
|
#10
10-27-2005, 05:28 AM
|
|||
|
|||
|
Re: Speed Limits
[ QUOTE ]
[ QUOTE ] [ QUOTE ] [ QUOTE ] [ QUOTE ] [ QUOTE ] The force due to drag is what I meant to put there. Replace m with A. [/ QUOTE ] (1/2) AV^2? [/ QUOTE ] Pretty sure you're going to need a drag coefficient and the density of the fluid in the there somewhere as well. [/ QUOTE ] Is it ok if I just leave it out so that we can see that the force is proportional to the square of the speed? k, thanx [/ QUOTE ] But there should also be a term to account for the "shape" of the object. [/ QUOTE ] A*Cd? Fd= .5 pv^2 A*Cd [/ QUOTE ] The shape will be taken into account in the drag coefficient (roughness etc.), the velocity vector (part of flow that is perpendicular to the object in question) and A, the surface area of the object in question.
|
 |
|
|
Hybrid Mode
