Wood Vs Metal
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Wood Vs Metal

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Wood Vs Metal Wood Vs Metal Presentation Transcript

  • What Has More Force Wood Or Metal Bat? By Nathaniel
  • HYPOTHESIS
    • A ball hit with a wood bat will travel farther than a ball hit with a metal bat.
    • Newton's second law .
  • Wood vs Metal
    • Wood
    • Greater Mass
    • Weighs more
    • Natural
    • Solid
    • Small sweet spot
    • Metal
    • Hollow
    • Acceleration
    • Does Not Break
    • Man Made
    • Large Sweet spot
    View slide
  • WOOD BAT WEIGHT AND MASS
    • Is a wood bat stronger? Yes or No
      • Mass- is a measure of total quantity of matter in
      • an object (Mass of a bat is a constant)
      • Weight- Weight is a measurement of the gravitational
      • force acting on an object ( Weight of an object
      • varies with the object’s geographical location)
      • Example: A 19oz bat at Woodward Academy weighs less at the equator and on the moon but the mass stays the same.
    View slide
  • Is a Wood bat Solid?
    • YES
    • Solid Is the physical state of a shape and a volume.
        • The three states of matter are
          • Solid: Wood is packed closely together
          • Liquid: Units are not packed closely together
          • Gas: Vapors are far apart.
  • Wood Bats are made of Natural Material
    • Wood is a pure substance that cannot be changed to other kinds of matter or physical means.
    • Wood is a common substance used in everyday life.
      • Home building
      • Heating homes
      • Making Furniture
      • Making Tooth picks
      • Making Baseball bats
      • Making Pencils And Paper
  • Wood Bat SWEET SPOT
    • What is a sweet spot? A perfect small area on the barrel of the bat. The Preferred area of the bat to hit the ball.
      • What happens when you hit the ball on the sweet spot?
      • The ball travels farther because of Newton's 2 nd law of motion
      • (F =M x A)
      • What happens if you don’t hit the ball on the sweet spot?
      • Bat vibrates and takes away energy from the ball.
      • If the ball is not hit on the sweet spot the ball does not travel as far.
  • Metal Bats are Hollow
    • Hollow means having a closed body which is not filled (bat barrels are empty)
      • weight is distributed different than a wood bat.
          • Center of mass for metal bat is closer to the handle.
          • Center of mass for wood bat is closer to the barrel.
      • Balance point: point on the bat where the weight can be balanced on both sides.
          • Lever first class : fulcrum is in the middle and the load and effort is on either side
          • Think of a see-saw
      • Inertia of the bat makes all the difference
          • Inertia is Newton's first law of motion: an object at rest stays at rest and an object in motion stays in motion.
    • What does this mean?: center of mass is influenced by balance point which affects inertia.
  • METAL BAT ACCELARTION
    • Metal bats are 5-7mph faster than the wood bat
    • Aluminum bats have the Trampoline effect
      • When a wood bat hits a ball it compress and loses 75% of it’s energy.
      • When an aluminum bat hits a ball it compresses but loses a fraction of it’s energy.
      • What makes this possible?
          • Energy -Comes from the batter’s body into the bat to the ball
          • Inertia -Comes from the bat moving to the ball.
  • METAL BATS DON’T BRAKE
    • Metal is strong
      • The handle is a thin metal tube with thick walls
      • The barrel is made of thin metal which may dent or crack but will not break.
      • Wood bats are made with wood or ash and will break if the bat hits the ball towards the middle closer to center of mass.
  • METAL BATS ARE MAN MADE
    • How are metal bats made?
      • Sprinting Toward First Base
          • Ironing process metal heated up to 900 degrees to create the barrel and the handle.
      • Passing Second Base
          • Cleaning, Heat Treating, and Aging
          • Heating treatment and aging up to 300 degrees
      • Rounding Third Base
          • Capping, and Silk Screening
          • Polishing
      • Safe at Home Plate
      • - Final Assembly and Packaging)
      • -Rubber grip and chemical coating.
  • THE WOOD BAT IS STONGER AND HAS MORE MASS BUT THE HITTER CAN CONTROL THE METAL BAT BETTER..
  • METAL BAT LARGE SWEET SPOT
    • Is a metal bat’s sweet spot larger than a wood bat’s sweet spot?
      • Yes because of the contact surface.
          • Metal bat has a large contact surface
            • Resulting in more hard hit balls
            • More home-runs with a good swing not a perfect swing
          • Wood bat has a small contact surface
            • Resulting in ground out or fly out
            • Home-runs must be a perfect swing.
          • The wood bat center of mass is close to the end of the barrel.
          • The center of mass of the metal bat is closer to the handle.
  • EXPERIMENT TO FIND OUT WHICH BAT HAS MORE SPEED AND DISTANCE The next two slides you will see me hit with a wood and metal bat. Hitting with both bats involves Newton's 2 nd law
  • Wood Bat Demonstration
  • Wood Bat Data 60ft 57ft 15ft 58ft 55ft Average Distance Distance Distance Distance
  • Wood Bat Data
  • Metal Bat Demonstration
  • Metal Bat Data 60ft 57ft 15ft 58ft 55ft Average Distance Distance Distance Distance
  • Metal Bat Data
  • Reference
    • Kelly, J. (2000). Baseball; Celebrate America’s national pastime in pictures: The history, the heroes, the gear, and the game. Dorling Kindersley Publishing, Inc. New York, N.Y.
    • Stoker, S.H. (2007). General Organic, and biological Chemistry(4 th ed). Houghtonn Mifflin, Boston, MA.
    • www. Kettlering.edu