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Talk of The Villages Florida (https://www.talkofthevillages.com/forums/)
-   The Villages, Florida, General Discussion (https://www.talkofthevillages.com/forums/villages-florida-general-discussion-73/)
-   -   Rt 44 & Powell Rd (https://www.talkofthevillages.com/forums/villages-florida-general-discussion-73/rt-44-powell-rd-179402/)

tuccillo 01-23-2016 11:26 AM
So am I, thank you also. Statements such as 45 and 55 are about the same is just not correct as you don't know the critical speed where significant injury and death will occur. You may very well survive a crash at 45 but die at 55. The different in KE is significant.

Quote:
Originally Posted by golfing eagles (Post 1176251)
I think I'm pretty well versed in physics and mathematics, but thanks anyway. However, when it comes to personal injury from a MVA, at a certain point the extra kinetic energy doesn't matter. You're just as dead from a suicide vest as you are from a nuclear bomb.

tuccillo 01-23-2016 12:02 PM
KE increases as the square of the velocity. It doesn't plateau, it goes up exponentially. The difference in KE between two speeds separated by 10 MPH decreases as speed increases. I think that is what you mean. 45 MPH vs. 55 MPH is still very significant at 50% more KE at 55 MPH. The physics of car crashes is complicated but you are always better off with less speed.

Quote:
Originally Posted by photo1902 (Post 1176260)
Speeds above 50 mph, kinetic energy plateaus. 45/55 it's significant.

TNLAKEPANDA 01-23-2016 12:09 PM
Drive safely and pay attention and you will avoid most accidents. May be even the stupid driver not paying attention. Unless of course if you get rear ended.

golfing eagles 01-23-2016 12:12 PM
Quote:
Originally Posted by tuccillo (Post 1176261)
So am I, thank you also. Statements such as 45 and 55 are about the same is just not correct as you don't know the critical speed where significant injury and death will occur. You may very well survive a crash at 45 but die at 55. The different in KE is significant.
You may be correct, I don't know the exact speed where it makes a significant difference, and there are a ton of variables. All I can say is my experience treating the victims of MVAs gives me the sense that 45 is frequently fatal.

tuccillo 01-23-2016 12:20 PM
On ToTV, I have noticed that many people try to pass off opinions as facts.

Quote:
Originally Posted by golfing eagles (Post 1176302)
You may be correct, I don't know the exact speed where it makes a significant difference, and there are a ton of variables. All I can say is my experience treating the victims of MVAs gives me the sense that 45 is frequently fatal.

outlaw 01-23-2016 12:21 PM
In this case, I would lean toward mass (M) being much more important than the difference between 45 and 55 mph (V2). A dump truck is always going to win, even if it is in park. Much of the kinetic energy is not transferred to the smaller, lighter car. Otherwise, wouldn't the dump truck have had to come to a complete stop upon impact?

golfing eagles 01-23-2016 12:23 PM
Quote:
Originally Posted by tuccillo (Post 1176306)
On ToTV, I have noticed that many people try to pass off opinions as facts.
me too

outlaw 01-23-2016 12:25 PM
Didn't we go through this whole increased speed equates to decreased safety in the 70s with interstate speeds being limited to 55 mph?

golfing eagles 01-23-2016 12:25 PM
Quote:
Originally Posted by outlaw (Post 1176307)
In this case, I would lean toward mass (M) being much more important than the difference between 45 and 55 mph (V2). A dump truck is always going to win, even if it is in park. Much of the kinetic energy is not transferred to the smaller, lighter car. Otherwise, wouldn't the dump truck have had to come to a complete stop upon impact?
short answer---no

It's called momentum and is a product of mass and velocity. Which is why the dump truck loses to a locomotive

outlaw 01-23-2016 12:26 PM
Quote:
Originally Posted by golfing eagles (Post 1176308)
me too
You two should join mensa.

golfing eagles 01-23-2016 12:28 PM
Quote:
Originally Posted by outlaw (Post 1176307)
In this case, I would lean toward mass (M) being much more important than the difference between 45 and 55 mph (V2). A dump truck is always going to win, even if it is in park. Much of the kinetic energy is not transferred to the smaller, lighter car. Otherwise, wouldn't the dump truck have had to come to a complete stop upon impact?
Although it would be nice---an interialess spacecraft would be a necessity for warp speeds!

outlaw 01-23-2016 12:28 PM
Quote:
Originally Posted by golfing eagles (Post 1176310)
short answer---no

It's called momentum and is a product of mass and velocity. Which is why the dump truck loses to a locomotive
So you're saying ALL the KE is transferred upon impact, even if the object is still moving?

golfing eagles 01-23-2016 12:29 PM
Quote:
Originally Posted by outlaw (Post 1176311)
You two should join mensa.
I turned down the invitation, their average IQ is much too low:1rotfl::1rotfl::1rotfl:

golfing eagles 01-23-2016 12:30 PM
Quote:
Originally Posted by outlaw (Post 1176313)
So you're saying ALL the KE is transferred upon impact, even if the object is still moving?
of course not

outlaw 01-23-2016 12:30 PM
Quote:
Originally Posted by golfing eagles (Post 1176312)
Although it would be nice---an interialess spacecraft would be a necessity for warp speeds!
You lost me at interialess????


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