The Breakdown: Burning Rubber

This extended rubber-burning session was performed in honor of the classic Burt Reynolds movie Smokey & The Bandit, but NASCAR drivers are also prone to peeling out after a victory. So, what's at work here? We asked University of Nebraska physicist Diandra Leslie-Pelecky, the author of a forthcoming book called The Physics of Nascar, to tease out the science in the clip, and she says it's basically a big, loud, smoke-filled demonstration of the law of conservation of energy.

Normally when you step on the gas in a rear-wheel drive car, the front tires roll, and the car goes forward. Here, though, the driver also keeps one foot on the brake. The front end of the car is trying to stay in place by keeping its wheels locked, while the back end is trying to drive forward. Some of the energy the engine produces still goes into moving the car around that parking lot, but a lot of it is also lost to sound and smoke.

The asphalt itself eats away at the tires like sandpaper smoothing out a piece of wood. "You're seeing the person burning off their tires, basically," Leslie-Pelecky says. While this display is pretty impressive, NASCAR drivers produce even more smoke than this adventurous driver because their tires don't have tread. Since the tires are smooth, there's more material in contact with the track, so they burn more rubber, faster.

The final lesson? "If you try this at home," Leslie-Pelecky says, "You'll probably need a new set of tires."—Gregory Mone

2 Comments

Comments

Cool! A scientific explanation of a dumb behavior. Now, please a scientific explanation for the reasons for this dumb behavior. But I guess, that would be not here. Popular Psychology I suspect.

I enjoyed this when I was younger. It was fun. But I grew up. I am better now. I hope to see the day when the waste of resources and pollution is not considered high-performance or is tolerated as entertainment in North America.

Karsten
http://www.polluteless.com

0 out of 0 people found this comment helpful
I found this comment 
 

Well, they probably (hopefully) used old tires that were getting replaced anyway. That's what I would have done.

0 out of 0 people found this comment helpful
I found this comment 
 
BOWN Block Header

speedy Wind Turbine Towers
"To maximize energy output, the tapered towers of the Bahrain World Trade Center funnel wind between them, creating a negative pressure zone behind the buildings that draws more air through the gap."
[Read full story]

speedy A Super-Strong Bridge Beam
"The Hillman Composite Beam weighs one third as much as concrete competitors—saving 20 percent on shipping and installation costs—and can hold 50 percent more weight."
[Read full story]

speedy Transforming Bamboo
"First Yan Xiao tore strips of bamboo from the stalk and arranged them in such a way as to provide the most strength. He then coated the strips with glue and compressed them in a self-built hydraulic press into beams, 33 feet long and up to three feet wide, each capable of supporting eight tons."
[Read full story]

speedy Surf the Web Without a Browser
"Adobe AIR's programming tools let developers create snazzy desktop applications that connect to the Web."

[Read full story]

Flickr Block Header

Share your photos in the Pop Sci pool at www.flickr.com!
Current theme: Spooky Science
Our latest winner

Subscribe for 2 free issues!

POP_embeddedForm_cover.jpg