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Science on the Course: The Physics of Golf

SCIENCE COURSE THE PHYSICS OF GOLF DETAILS DİMPLES IN THE 1908: Balls have The first patent for dimpled between 330 and 500 golf balls dimples. A ball with dimples travels about twice as far as a smooth ball. DIMPLED SMOOTH Dimples increase the magnus effect. Dimples give more lift and less drag. The ball creates a whirpool around itself and experiences a force Without dimples, balls would hit the ground sooner. perpendicular to the line of motion. When hit squarely, V. a ball travels Spin in the same direction as airflow LIFT FORCE Spin in the same direction as airflow with backspin, rotating counterclockwise. A ball hit with backspin will stay in the air 2-3 seconds longer DRAG P. P, FLIGHT PATH than one hit without backspin. Swirling eddies Golf balls follow the impetus trajectory. The ball follows a straight trajectory with decreasing velocity. The force is then exhausted, so the ball falls in a straight line. IN FULL SWING The effect of 150 swing speed on ball distance LONG DRIVE PROS 125 TOUR PROS DRIVE AVERAGE PROS GOLFERS TOUR 75 AVERAGE GOLFERS 100 150 250 300 350 400 CARRY DISTANCE (YARDS) The greater the swing speed a golfer can manage, the longer the drives. *----- AMATEUR MEN PGA PRO #1 LEGEND: 298 YARDS 90 MPH 119 MPH 225 YARDS PGA TOUR AVERAGE PGA PRO #2 CLUB HEAD 113 288 YARDS 309 YARDS AVERAGE DISTANCE 121 MPH TOP PGA LONG DRIVE AVERAGE PRO #3 418 YARDS 123 310 YARDS MРН Golf ball velocity a = the angle the ball is launched from the horizontal 1220 DEGREES: Vy, Vx = the direction the ball will go OPTIMUM LAUNCH ANGLE FOR MAXIMUM RANGE j, i = vector directions (i is in the x direction, jis in the y direction) v = velocity WELCOME TO THE CLUB Several forces act on the golf club, including: Double pendulum effect The upper pendulum (arms and hands) swings from a fixed pivot point (shoulders) while the lower pendulum (club head and club shaft) swings from the end of the upper one. Centrifugal force This keeps the club moving until it's straight with the arms. The force starts from the shoulders. Л Torque Atwisting force that starts in the golfer's leg. When the club head hits the ball, grooves on the head increase the amount of friction. This allows for backspin. ´When temperature affects play When temperatures exceed 100 degrees, pro golfers swinging at around 120 mph can gain up to 15 yards in ball distance versus when it's 70 degrees. BROILING COMFORTABLE COLD (100 F) (70°F) (40 F) Skill and practice are two major factors in a golfer's success. An amateur golfer's chance ofa hole-in-one is 12,500 to 1, while a pro golfer's chance is 2,500 to 1. The forces of physics have helped and hindered golf scores and the odds for that prized ace. GOLFDIGEST.COM HOLEINONEINSURANCE.COM HUMANKINETICS.COM MATH.UCR.EDU NJ.COM SPORTSNSCIENCE.UTAH.EDU SWINGMANGOLF.COM THEBUDDHABALL.COM VANDERBILT.EDU BROUGHT TO YOU BY IN PARTNERSHIP WITH Quicken Loans GHERGICH&Co. Official Mortgage Sponsor of the PGA TOUR SWING SPEED (MPH)

Science on the Course: The Physics of Golf

shared by Ghergich on Sep 05
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Whether you’re an aspiring pro, or a beginning amateur, golfing can be an amazing way to relax and get exercise. For many, however, the game can be confusing, or downright frustrating, without lots ...

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