Physics Van 3-site Navigational Menu

Physics Van Navigational Menu

Q & A: Height of ball bounce

Learn more physics!

Most recent answer: 09/16/2009
Q:
How do you determine the height of a balls bounce if you know the height it was dropped from and the balls radius? What does that have to do with the number of times it hits the floor?
why people cheat infidelity signs how many people cheat
why people cheat catch a cheat how many people cheat
hillcrest abortion clinic stories of abortion live abortion video
the best android phone link phone tracking apps
married woman looking to cheat My wife cheated on me most women cheat
married men cheat with men why husbands cheat wifes cheat
types of abortions the weeks of pregnancy what happens when you get an abortion
coupons rx prostudiousa.com www.januvia.com coupons
viagra coupon card blog.brunothalmann.com viagra free coupon
cialis price online link cialis price history
cialis coupons from lilly prescription drug cards coupons for prescriptions
naproxennatrium site naproxen migraine
voltaren ára go voltaren
proscar vs propecia for hair loss proscar proscar pris
seroquel 25 mg site seroquel debljanje
cialis open cialis walgreen coupon
renovacija stanovanja renovator renova g
vivitrol alcohol vivitrol implant narcan challenge

- Leslie
A:
The height to which a ball will bounce depends on the height from which it is dropped, what the ball is made out of (and if it is inflated, what the pressure is), and what the surface it bounces from is made out of. The radius of the ball doesn't really matter, if you are measuring the height of the ball from the bottom of the ball to the ground.

A ball's gravitational potential energy is proportional to its height. At the bottom, just before the bounce, this energy is now all in the form of kinetic energy. After the bounce, the ball and the ground or floor have absorbed some of that energy and have become warmer and have made a noise. This energy lost in the bounce is a more or less constant fraction of the energy of the ball before the bounce. As the ball goes back up, kinetic energy (now a bit less) gets traded back for gravitational potential energy, and it will rise back to a height that is the original height times (1-fraction of energy lost). We'll call this number f. For a superball, f may be around 90% (0.9) or perhaps even bigger. For a steel ball on a thick steel plate, f is >0.95. For a properly inflated basketball, f is about 0.75. For a squash ball, f might be less than 0.5 or 0.25 - squash balls are not very bouncy. The steel ball on an unvarnished pine wood floor may not bounce at all, but rather make a dent, and so what the floor is made out of makes quite a lot of difference.

For multiple bounces, it's just like dropping the ball again from a reduced height. If the first height is h, the second will be f*h, the third f*f*h, the fourth f*f*f*h, and so on. So if f is 0.9, the first bounce will be 0.9 times as high, the second 0.81 times as high, the third 0.729 times as high (as the original height), and so on.

Try it yourself! Does f depend on the height? (it shouldn't much, but it might..) Try it for different balls!

Tom
why people cheat infidelity signs how many people cheat
why people cheat catch a cheat how many people cheat
hillcrest abortion clinic site live abortion video
the best android phone mealmixer.com phone tracking apps
internet drug coupons coupons for prescription medications prescription coupon
free prescription cards go walgreens prints coupon codes
online discount pharmacy viagra coupons and discounts coupon for prescription
coupons for prescriptions click prescription drugs discount cards
coupons prescriptions blog.brunothalmann.com manufacturer coupons for prescription drugs
acheter viagra pas http://acheterviagraenfrance.com/pas acheter viagra pas
cialis price online lipseysguns.com cialis price history
cialis coupon lilly blog.nvcoin.com transfer prescription coupon
drug discount coupons blog.suntekusa.com discount coupons for prescriptions
discount prescription drug cards cialis online coupon prescription discounts cards
claritinekombo warpedfish.co.uk claritine za psa
claritinekombo warpedfish.co.uk claritine za psa
naprosyn roche rileytech.net naprosyn nedir
naprosyn roche rileytech.net naprosyn nedir
niacine movidafm.net niacin v hrani
cefdinir red stool ski-club-auringen.de cefdinir nedir
amlodipine 5 mg link amlodipine accord
lasix injetavel lasix lasix
voltaren retard link voltaren spray
voltaren retard voltaren forte voltaren spray
trental cena trenitalia trental nuspojave

(published on 10/22/2007)

Follow-Up #1: Bouncing balls

Q:
which type of ball bounces the most ? which kind of ball bounces the most ?
cheater click wifes who cheat
the best android phone mealmixer.com phone tracking apps
married cheaters site dating for married men
imitrex 50mg site flagyl 200mg
coupons for prescriptions new prescription coupons prescription drugs discount cards
cialis manufacturer coupon cialis discounts coupons prescription drug coupons
discount prescription drug cards cialis online coupon prescription discounts cards
voltaren ára go voltaren
augmentin générique arbot.cz augmentin sirop
diflucan 150 site diflucan sirup
proscar vs propecia for hair loss proscar proscar pris
seroquel 25 mg read seroquel debljanje
cialis driverblog.suddath.com cialis walgreen coupon
motilium enceinte site motilium et grossesse
cialis coupon card evans.com.mx cialis coupon

- vanessa and tricia (age 12)
chicago il us
A:
The best I have seen is called a Super Ball.  You can buy one in a novelty shop. Tennis balls bounce about 53% of their dropped height, Super Balls about 85 or 90 % of their dropped height. I've never tried golf balls; why don't you try one and let us know.  The differences in bounce height depend on the style of construction as well as the material the balls are made of.

LeeH
why people cheat marriage affairs how many people cheat
hillcrest abortion clinic site live abortion video
the best android phone link phone tracking apps
the best android phone mealmixer.com phone tracking apps
internet drug coupons open prescription coupon
abortion pill clinics abortion pill prices for abortions
married cheaters site dating for married men
discount card prescription go print cvs
priligy 30mg bistromc.org cialis 40mg
coupons rx prostudiousa.com www.januvia.com coupons
levaquin pill cephalexin 250mg furosemide pill
levitra pill imitrex 25mg tadalafil pill
viagra coupons free read drug coupons
discount prescriptions coupons mba-institutes.com internet drug coupons
lisinopril and energy drinks lisinopril and energy drinks lisinopril and energy drinks
cialis price online lipseysguns.com cialis price history
drug discount coupons link discount coupons for prescriptions
voltaren ára house.raupes.net voltaren
champix alkohol go champix
champix alkohol go champix
niacine movidafm.net niacin v hrani
cefdinir red stool cefdinir nedir cefdinir nedir
voltaren retard voltaren pomada voltaren spray
motilium enceinte motilium notice motilium et grossesse
cialis coupon card coupon prescription cialis coupon
prescriptions coupons cialis coupon drug prescription card
trental cena trental trental nuspojave
vivitrol alcohol what is vivitrol shot narcan challenge

(published on 05/09/2008)

Follow-Up #2: Golf ball drop experiment

Q:
I did an expieriment dropping a golf ball on cement and it bounced an average of 5.454545... does that mean that that would be the fraction of energy lost, or does it need to be tested on a designated surface?
hillcrest abortion clinic site live abortion video
the best android phone how to spy on cell phones phone tracking apps
married men cheat with men women that cheat with married men wifes cheat
cvs discount card cvs coupon online prescription drugs discount cards
discount card prescription site print cvs
discount card prescription damske.com print cvs
ventolin 2mg bistromc.org deltasone 40mg
prescription drugs coupons viagra manufacturer coupon 2016 viagra coupon card
where buy viagra online http://viagraforsaleuk1.com online viagra buy
venlafaxine gewichtstoename read venlafaxine fk
augmentin générique arbot.cz augmentin sirop
champix alkohol click champix
fusidinezuur kopen fusidinezuur kopen fusidic acid
nurofen cold and flu dosage internetsellout.com nurofen plus dosage
how expensive is an abortion abortion clinic abortion clinics dallas tx

- Marcus Johnson (age 12)
A:
Hi Marcus.   You don't give us enough information to tell what is going on.  For example what does the number 5.45... mean?.  Is that in inches, centimeters, per cent...?  How high was the drop?  What kind of surface?
Give us some more details.

LeeH 
why people cheat infidelity signs how many people cheat
why people cheat marriage affairs how many people cheat
cheater read wifes who cheat
the best android phone link phone tracking apps
discount card prescription damske.com print cvs
diprolene site furosemide 40mg
online discount pharmacy dotnetblogengine.net coupon for prescription
prescription drugs coupons go viagra coupon card
viagra coupon card blog.brunothalmann.com viagra free coupon
can i take antabuse and naltrexone can i take antabuse and naltrexone can i take antabuse and naltrexone
acheter viagra pas acheter viagra pas acheter viagra pas
cialis coupons from lilly coupon for free cialis coupons for prescriptions
cialis manufacturer coupon link prescription drug coupons
lilly cialis coupon prostudiousa.com coupons prescriptions
champix alkohol mdwguide.com champix
fusidinezuur kopen go fusidic acid
fluvoxamine (luvox) blog.tgworkshop.net fluvoxamina bula
cialis cialis discount cialis walgreen coupon
voltaren retard voltaren forte voltaren spray
voltaren retard voltaren forte voltaren spray
how expensive is an abortion abortion clinic abortion clinics dallas tx
how expensive is an abortion do abortions hurt abortion clinics dallas tx

(published on 09/16/2009)

Follow-up on this answer.