Download Baseball (Its Not Nuclear Physics) PowerPoint Presentation

Iframe embed code :

Unable to generate embed code for this presentation.request for embed code @ mail[at]slidesfinder.com

Presentation url :

Home / Art & Culture / Art & Culture Presentations / Baseball (Its Not Nuclear Physics) PowerPoint Presentation

Baseball (Its Not Nuclear Physics) PowerPoint Presentation

PowerPoint is the world's most popular presentation software which can let you create professional Baseball (Its Not Nuclear Physics) powerpoint presentation easily and in no time. This helps you give your presentation on Baseball (Its Not Nuclear Physics) in a conference, a school lecture, a business proposal, in a webinar and business and professional representations.

The uploader spent his/her valuable time to create this Baseball (Its Not Nuclear Physics) powerpoint presentation slides, to share his/her useful content with the world. This ppt presentation uploaded by worldwideweb in Art & Culture ppt presentation category is available for free download,and can be used according to your industries like finance, marketing, education, health and many more.

About This Presentation

worldwideweb

Description : Baseball (Its Not Nuclear Physics) Presentation : Download Baseball (Its Not Nuclear Physics) ppt presentation and make your presenation attractive

Tags : Baseball (Its Not Nuclear Physics)

Published on : Dec 09, 2014
Views : 1647 | Downloads : 0

Download Now

Share on Social Media

Slide 1 -

The Physics of Baseball (or…Just How Did McGwire Hit 70?) Alan M. Nathan University of Illinois February 5, 1999 Introduction Hitting the Baseball The Flight of the Baseball Pitching the Baseball Summary

Slide 2 -

REFERENCES The Physics of Baseball, Robert K. Adair (Harper Collins, New York, 1990), ISBN 0-06-096461-8 The Sporting Life, Davis and Stephens (Henry Holt and Company, New York, 1997), ISBN 0-8050-4540-6 http://www.exploratorium.edu/sports ME! a-nathan@uiuc.edu www.npl.uiuc.edu/~nathan

Slide 3 -

Hitting the Baseball “...the most difficult thing to do in sports” --Ted Williams, Professor Emeritus of Hitting

Slide 4 -

Speed of Hit Ball: What does it depend on? Speed is important: 105 mph gives 400 ft each mph is worth 5 ft The basic stuff (“kinematics”) speed of pitched ball speed of bat weight of bat The really interesting stuff (“dynamics”) “bounciness” of ball and bat weight distribution of bat vibrations of bat

Slide 5 -

What Determines Batted Ball Speed? How does batted ball speed depend on ... pitched ball speed? bat speed? V = 0.25 Vball + 1.25 Vbat Conclusion: Bat Speed Matters More!

Slide 6 -

What Determines Batted Ball Speed? Mass of bat Conclusion: mass of bat matters ...but not a lot

Slide 7 -

Dynamics of Ball-Bat Collision Ball compresses kinetic energy stored in “spring” Ball expands kinetic energy restored but... 70% of energy is lost! (heat, deformation,vibrations,...) Forces are large (>5000 lbs!) Time is short (<1/1000 sec!) The hands don’t matter!

Slide 8 -

Slide 9 -

The Coefficient of Restitution COR measures “bounciness” of ball Final speed/Initial speed For baseball, COR=.52-.58 Changing COR by .05 changes V by 7 mph (35 ft!) How to measure? This is square of COR------->

Slide 10 -

What About the Bat? (or, it takes two to tango!) Wood Bat Efficiently restores energy But only 2% energy stored Bat Performance Factor (BPF) ~1 .02 Aluminum Bat Stores ~ 20% energy Efficiently restores energy Result: “trampoline effect” BPF ~ 1.2 Ball flies off the bat! A more efficient bat and/or ball

Slide 11 -

Properties of Bats length, diameter weight position of center of gravity where does it balance? distribution of weight “moment of inertia” center of percussion stiffness and elasticity vibrational nodes and frequencies

Slide 12 -

Sweet Spot #1: Center of Percussion When ball strikes bat... Linear recoil conservation of momentum Rotation about center of mass conservation of angular momentum When CP hit The two motions cancel at handle No reaction force felt at handle

Slide 13 -

Sweet Spot #2: Maximum Energy Transfer Barrel end of bat maximizes bat speed Center of Mass minimizes angular impulse MET must be in between Not on COP! Aluminum bat more effective for inside pitches

Slide 14 -

Sweet Spot #3: “Node” of Vibration Collision excites bending vibrations in bat Ouch!! Energy lost ==>lower COR Sometimes broken bat Reduced considerably if collision is a node of fundamental mode Fundamental node easy to find For an interesting discussion, see www.physics.usyd.edu.au/~cross

Slide 15 -

So you think bats cannot bend…..

Slide 16 -

So you think bats cannot bend…..

Slide 17 -

How Would a Physicist Design a Bat? Wood Bat already optimally designed highly constrained by rules! a marvel of evolution! Aluminum Bat lots of possibilities exist but not much scientific research a great opportunity for ... fame fortune

Slide 18 -

Advantages of Aluminum Length and weight “decoupled” Can adjust shell thickness More compressible => “springier” Trampoline effect More of weight closer to hands Easier to swing Less rotational energy transferred to bat More forgiving on inside pitches Stiffer for bending Less energy lost due to vibrations

Slide 19 -

Aerodynamics of a Baseball Forces on Moving Baseball No Spin Boundary layer separation DRAG! Grows with v2 With Spin Ball deflects wake action/reaction==>Magnus force Force grows with rpm Force in direction front of ball is turning

Slide 20 -

The Flight of the Balll Role of Drag Role of Spin Atmospheric conditions Temperature Humidity Altitude Air pressure Wind

Slide 21 -

The Home Run Swing Ball arrives on 100 downward trajectory Big Mac swings up at 250 Ball takes off at 350 The optimum home run angle!

Slide 22 -

ppt slide no 22 content not found

Slide 23 -

The Role of Friction Friction induces spin for oblique collisions Spin => Magnus force Results Balls hit to left/right break toward foul line Backspin keeps fly ball in air longer Topspin gives tricky bounces in infield Pop fouls behind the plate curve back toward field

Slide 24 -

Pitching the Baseball “Hitting is timing. Pitching is upsetting timing” ---Warren Spahn vary speeds manipulate air flow orient stitches Don Larsen, 1956 World Series Last pitch of perfect game

Slide 25 -

Let’s Get Quantitative! I. How Large are the Forces? Drag is comparable to weight Magnus force < 1/4 weight)

Slide 26 -

Let’s Get Quantitative! II. How Much Does the Ball Break? Depends on… Magnitude and direction of force Time over which force acts Calibration 90 mph fastball drops 3.5’ due to gravity alone Ball reaches home plate in ~0.45 seconds Half of deflection occurs in last 15’ Drag reduces fastball by about 8 mph Examples: Hop of 90 mph fastball: ~4” Break of 70 mph curveball ~16” slower force larger

Slide 27 -

Example 1: Fastball 85-95 mph 1600 rpm (back) 12 revolutions 0.46 sec M/W~0.1

Slide 28 -

Example 2: Split-Finger Fastball 85-90 mph 1300 rpm (top) 12 revolutions 0.46 sec M/W~0.1

Slide 29 -

Example 3: Curveball 70-80 mph 1900 rpm (top and side) 17 revolutions 0.55 sec M/W~0.25

Slide 30 -

Example 4: Slider 75-85 mph 1700 rpm (side) 14 revolutions 0.51 sec M/W~0.15

Slide 31 -

Examples of Trajectories

Slide 32 -

Effect of the Stitches Obstructions cause turbulance Turbulance reduces drag Dimples on golf ball Stitches on baseball Asymmetric obstructions Knuckleball Two-seam vs. four-seam delivery Scuffball and “juiced” ball

Slide 33 -

Summary Much of baseball can be understood with basic principles of physics Conservation of momentum, angular momentum, energy Dynamics of collisions Trajectories under influence of forces gravity, drag, Magnus,…. There is probably much more that we don’t understand Don’t let either of these interfere with your enjoyment of the game!

Frequently Asked Questions

> About SlidesFinder?

Slidesfinder is a website that allows users to upload and share their PowerPoint presentations online. It provides a platform for individuals and businesses to share their ideas and knowledge through presentations, and for others to view and download these presentations for educational or professional purposes.
Slidesfinder offers a wide range of presentation topics and categories, including business, education, science, technology, health, and more. Users can also search for presentations using keywords, tags, or by category. The website provides tools to create professional presentations with rich media, animations, and graphics.

One of the key features of Slidesfinder is its user-friendly interface, which allows users to easily upload, view, and share presentations. Users can also embed their presentations in their websites or blogs using the website's embed code feature.
Slidesfinder also offers premium services, such as the ability to create private presentations and to download presentations in high-quality formats. However, the basic features of Slidesfinder are free to use, making it accessible to anyone who wants to share their ideas and knowledge through presentations.

> How do I register with SlidesFinder?

Go to registration page (you can see signup link on top of website page) https://www.slidesfinder.com/signup . If you have facebook/gmail account them just click on SIGN IN WITH FACEBOOK OR SIGN IN WITH GOOGLE button, by this you will be a registered member of slidesfinder without filling any form, required detail automatically will be fatch from your account. If you do not a Facebook account, then click on "Signup". Fill all required fields and you will be a registered member of slidesfinder.

> Is slidesfinder account confirmation is mandatory?

Yes it is mandetory to active your account to login.

> Do I need to signup/login on SlidesFinder before uploading a PowerPoint presentation?

Yes, you need to login with your account before uploading presentation. Your username will be displayed on your uploaded presentation. Your registered email id is needed for sending your stats of uploaded presentation.

Slidesfinder is a sharing website for PowerPoint presentations search and share. Find your interest in the form of powerpoint presentations on slidesfinder and save your valuable time . On Slidesfinder you get presentations from our huge library of professional ppt presentations. We believe in making your search INFORMATIVE and FUN. Find your best ppt presentation from a pool of PowerPoint presentations stacked under important industry categories like business & management, heath & Wellness,eduction & training etc. We provide unique informative PowerPoint presentation for marketers, presenters and educationists. These professional PowerPoint presentations are uploaded by professionals from across numerous industry segments.These ppt presentations are available for FREE download.

Not just finding your interest, but facilitate you broadcast your interest. We have created this platform for easy sharing of PowerPoint presentations, ensuring that these presentations get maximum exposure. Create your slidesfinder account and upload PowerPoint presentations for free, share on social media platforms and BUILD YOUR CROWD WITH PRESENTATION !!

The Great Buddha says, "Share your knowledge.It’s a way to achieve immortality"! So, start sharing knowledge and we are here to make that immortal !!

Re-productivity of content are not allowed. Without prior written permission from author, commercial use of any content is illegal.