Featured Research

from universities, journals, and other organizations

Balls Stick, Shoes Slide: Serving Up Tennis Court Physics

Date:
August 30, 2001
Source:
American Institute Of Physics
Summary:
Not all tennis surfaces are created equal, as Jennifer Capriati found out at Wimbledon in July. After winning the Australian Open on hard courts, and French Open on clay courts, Capriati lost on the grass of Wimbledon in the semi-finals. Now a physics professor at the University of Sydney is looking into some of the peculiar properties of clay tennis courts - which may explain why players like Capriati are able to triumph on clay courts, but may stumble on grass.

Not all tennis surfaces are created equal, as Jennifer Capriati found out at Wimbledon in July. After winning the Australian Open on hard courts, and French Open on clay courts, Capriati lost on the grass of Wimbledon in the semi-finals. Now a physics professor at the University of Sydney is looking into some of the peculiar properties of clay tennis courts - which may explain why players like Capriati are able to triumph on clay courts, but may stumble on grass.

"Different surfaces are characterized by their speed and bounce," says Professor Rod Cross. In the September issue of The Physics Teacher, Cross explains that "clay courts are covered with a layer of fine sand that allows a player to slide into and out of a shot much more easily than on grass." But Cross found that while the player can slide more easily, the sand actually causes the ball to "stick" to the court, slowing it down. "In this sense," says Cross, "clay courts can be either fast or slow depending on whether we are referring to the ball or the player."

A player can slide without slipping, says Cross, because the very fine sand on clay tennis courts acts like ball bearings under a player’s shoe. "If the grains were perfect spheres," he explains, "the surface would be extremely slippery." But sand actually has pointy bits with rounded ends, so it doesn’t end up being too slippery. On the other hand, the cloth of a tennis ball actually captures and drags sand when it hits the court, making it behave like sandpaper, slowing it down.

Players are good at adapting to different surfaces, says Cross. "On a fast grass court, they serve as fast as possible; on clay, they drop the serve speed in order to put more spin on the ball." The result is a fast, low bounce on grass, which is hard to return, and on clay a slower, higher bounce, which is also hard to return.

And hard courts like the ones used in the US Open? They’re somewhere in between. "Hard courts are medium speed," says Cross, "and medium to high bounce." And that could be good news for Jennifer Capriati – who has already shown her strength on hard courts this year.


Story Source:

The above story is based on materials provided by American Institute Of Physics. Note: Materials may be edited for content and length.


Cite This Page:

American Institute Of Physics. "Balls Stick, Shoes Slide: Serving Up Tennis Court Physics." ScienceDaily. ScienceDaily, 30 August 2001. <www.sciencedaily.com/releases/2001/08/010830082203.htm>.
American Institute Of Physics. (2001, August 30). Balls Stick, Shoes Slide: Serving Up Tennis Court Physics. ScienceDaily. Retrieved October 23, 2014 from www.sciencedaily.com/releases/2001/08/010830082203.htm
American Institute Of Physics. "Balls Stick, Shoes Slide: Serving Up Tennis Court Physics." ScienceDaily. www.sciencedaily.com/releases/2001/08/010830082203.htm (accessed October 23, 2014).

Share This



More Matter & Energy News

Thursday, October 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Chameleon Camouflage to Give Tanks Cloaking Capabilities

Chameleon Camouflage to Give Tanks Cloaking Capabilities

Reuters - Innovations Video Online (Oct. 22, 2014) — Inspired by the way a chameleon changes its colour to disguise itself; scientists in Poland want to replace traditional camouflage paint with thousands of electrochromic plates that will continuously change colour to blend with its surroundings. The first PL-01 concept tank prototype will be tested within a few years, with scientists predicting that a similar technology could even be woven into the fabric of a soldiers' clothing making them virtually invisible to the naked eye. Matthew Stock reports. Video provided by Reuters
Powered by NewsLook.com
Jet Sales Lift Boeing Profit 18 Pct.

Jet Sales Lift Boeing Profit 18 Pct.

Reuters - Business Video Online (Oct. 22, 2014) — Strong jet demand has pushed Boeing to raise its profit forecast for the third time, but analysts were disappointed by its small cash flow. Fred Katayama reports. Video provided by Reuters
Powered by NewsLook.com
Internet of Things Aims to Smarten Your Life

Internet of Things Aims to Smarten Your Life

AP (Oct. 22, 2014) — As more and more Bluetooth-enabled devices are reaching consumers, developers are busy connecting them together as part of the Internet of Things. (Oct. 22) Video provided by AP
Powered by NewsLook.com
What Is Magic Leap, And Why Is It Worth $500M?

What Is Magic Leap, And Why Is It Worth $500M?

Newsy (Oct. 22, 2014) — Magic Leap isn't publicizing much more than a description of its product, but it’s been enough for Google and others to invest more than $500M. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins