Why does a cricket ball swing or a baseball curve?

Slides:



Advertisements
Similar presentations
VISUAL PHYSICS School of Physics University of SydneyAustralia.
Advertisements

web notes: lect5.ppt.
How air and water move things
MAE 3241: AERODYNAMICS AND FLIGHT MECHANICS
Sports and Angular Momentum Dennis Silverman Bill Heidbrink U. C. Irvine.
The Physics of Golf By Drew Thomassin Drew Thomasson.
Balls and Air 1 Balls and Air. Balls and Air 2 Introductory Question You give a left (clockwise) spin to a football. Which way does it deflect? You give.
FLUID FLOW IDEAL FLUID BERNOULLI'S PRINCIPLE How can a plane fly? How does a perfume spray work? What is the venturi effect? Why does a cricket ball swing.
Fluid in Motion.
External Flows.
The Physics of Sports Geneva Middle School 25 February 2010.
Fluid Dynamics Introduction Section 0 Lecture 1 Slide 1 Lecture 21 Slide 1 INTRODUCTION TO Modern Physics PHYX 2710 Fall 2004 Physics of Technology—PHYS.
The transmission of energy from an object passing through a fluid to the fluid is known as fluid resistance. The resistance of an object passing through.
The Physics of Balloons and Submarines…cont’d…. The Ideal Gas Law Equation We learned that Pressure of an Ideal Gas is proportional to Particle Density.
Introduction to Fluid Mechanics
Dynamic Fluid Forces Forces that result when an object moves through a fluid, or when a fluid moves past an object. Pages in book.
© 2006 Baylor University Slide 1 Introduction to Fluid Mechanics Bellagio Fountain.
What keeps the ball above the stream of air?. Fluids in Motion Viscosity is the resistance of a gas or liquid to flow. Bernoulli’s principle states that.
Bernoulli’s Principle. Bernoulli ’ s equation Consider a small time interval δt in which the fluid at X has moved to X’ and that at Y to Y’. At X, work.
Linear Motion Movement in a straight line of a body or body part. (Translatory motion) The sprinter runs from A to B. The pathway of the runner is a straight.
BIOMECHANICAL PRINCIPLES
Hydraulic & Pneumatic Systems
LESSON LD04 Aerodynamics
L 15 Fluids [4] > Fluid flow and Bernoulli’s principle > Airplanes and curveballs > viscosity > surface tension.
Flight and Paper Planes Dr Eric Webster. Bernoulli ’ s Theorem When air flows fast the pressure of the air is lowered.
How Can Forces Affect Objects?. Slow them down Speed them up Stop them Start them Change their direction Change their shape.
KEY KNOWLEDGEKEY SKILLS Projectile motion of the human body and objects through the air and through water  Key principles associated with projectile motionof.
Wind tunnel visualization of air flow AIR streamlines.
INVERTEBRATES AND FLUID DYNAMICS: OFF THE GROUND & MOVIN’ AROUND.
Aerodynamic Forces Lift and Drag.
Biomechanical Principles of Motion through air and water
Human movement through air and water
Fluids Physics 202 Lecture 3. Pascal’s principle: any pressure change will flow through the entire fluid equally.
Physics In Baseball By: Justin Haines. Motion “In physics, motion is a change in position of an object with respect to time.” Running the bases Moving.
4.2 Notes RESISTANCE IN FLUID SYSTEMS. Resistance in Fluid Systems Drag - the force opposing motion when a solid moves through a fluid Drag occurs only.
Resistance in Fluid Systems Mr. Andracke Principles of Technology.
The Laws of Motion Newton’s Three Laws of Motion:
The Sky’s the Limit. Terms Acceleration Aerodynamics Air Pressure Balanced forces Drag Force Gravity Lift Mass Propulsion Thrust Unbalanced forces.
ROLLING FRICTION AND FLUID FRICTION PER 6. DEFINE ROLLING FRICTION ROLLING RESISTANCE, SOMETIMES CALLED ROLLING FRICTION OR ROLLING DRAG, IS THE FORCE.
Physics of balls Adam Szalai Jurisich Miklós High School KŐSZEG.
Projectile Motion.
CE 1501 Flow Over Immersed Bodies Reading: Munson, et al., Chapter 9.
What is Bernoulli’s principle?
at:
Sect. 14.6: Bernoulli’s Equation. Bernoulli’s Principle (qualitative): “Where the fluid velocity is high, the pressure is low, and where the velocity.
The Physics of Sports. Main Injector, 2 miles around Tevatron, 4 miles around Fermilab.
L 15 Fluids - 4 Fluid flow and Bernoulli’s principle
Applications of Bernoulli’s Principle faster speed slower speed more pressureless pressure If no change in height: P + ½ρv 2 = constant P+ ρgy + ½ ρv.
Balls and Air 1 Balls and Air. Balls and Air 2 Introductory Question A smooth, gentle river flows past a cylindrical post. At the sides of the post, is.
Balls and Air. Observations about Balls and Air Air resistance slows a ball down Air resistance slows a ball down The faster a ball moves, the quicker.
 How does a windmill blades work and create energy?
Section 3-3. Fluid Speed and Pressure Bernoulli’s Principle: As the speed of a fluid increases, the fluid’s pressure decreases. Bernoulli’s Principle:
Fluids and Motion 3.3. Daniel Bernoulli Discovered as the speed of a moving fluid increases, the pressure decreases. Called the Bernoulli Principle.
LESSON LD04 Aerodynamics
The Principles of Flight
L 15 Fluids [4] >Fluid flow and Bernoulli’s principle
Chapter 11 Fluids.
L 15 Fluids [4] >Fluid flow and Bernoulli’s principle
Energy Systems An energy system is a method by which energy is transferred and work is done. There are four basic types of energy systems: Mechanical Fluid.
L 15 Fluids [4] > Fluid flow and Bernoulli’s principle
The Physics of Baseball
BIOMECHANICS FLUID MECHANICS.
♠ ♠ ♠ ♠ ♠ ♠ ♠ ♠ Objectives القرص الدوار والدولاب مجلس أبوظبي للتعليم
Bernoulli’s Principle
LESSON LD04 Aerodynamics
L 15 Fluids [4] >Fluid flow and Bernoulli’s principle
Turbulence: Examples Turbulence Boundary Layer Separations.
LESSON LD04 Aerodynamics
Balls and Frisbees.
Presentation transcript:

Why does a cricket ball swing or a baseball curve? FLUID FLOW MOTION OF OBJECTS IN FLUIDS How can a plane fly? Why does a cricket ball swing or a baseball curve? Why does a golf ball have dimples? web notes: lect6a.ppt flow4.pdf flight.pdf

Resultant FR Lift FL drag FD Motion of object through fluid FORCES ACTING ON OBJECT MOVING THROUGH FLUID Lift FL drag FD Resultant FR Motion of object through fluid Fluid moving around stationary object

The pattern is symmetrical Uniform motion of an object through an ideal fluid ( = 0) The pattern is symmetrical  FR = 0 C A B D

Drag force frictional drag (viscosity) pressure drag (eddies – lower pressure)

NO CURVE Drag force due to pressure difference low pressure region motion of air Drag force due to pressure difference motion of object low pressure region rotational KE of eddies  heating effect  increase in internal energy  temperature increases NO CURVE Drag force is opposite to the direction of motion high pressure region

ball: curved flight flow speed (high) vair + v  reduced pressure v motion of air Drag force due to pressure difference ball: curved flight motion of object flow speed (high) vair + v  reduced pressure v vair (vball) MAGNUS EFFECT flow speed (low) vair - v  increased pressure v Boundary layer – air sticks to ball (viscosity) – air dragged around with ball high pressure region low pressure region

Professional golf drive Initial speed v0 ~ 70 m.s-1 Angle ~ 6° Spin  ~ 3500 rpm Range ~ 100 m (no Magnus effect) Range ~ 300 m (Magnus effect)

How can a plane fly?

FLift = CL ½  vs2 A

NO !!! rest in peace

Feedback: Privacy Policy Feedback
Do Not Sell My Personal Information
About project: SlidePlayer Terms of Service

© 2024 SlidePlayer.com Inc. All rights reserved.